Unreasonable Impact Americas 2023 by Unreasonable Group

Americas 2023

Unreasonable Impact is an international network focused on scaling socially impactful solutions that will help build a more inclusive economy and create a cleaner future. It is an innovative multi-geographic partnership between Barclays and Unreasonable to support high growth ventures at the forefront of mission-driven innovation. Since 2016, Unreasonable Impact has met participating entrepreneurs at a pivotal stage of their growth journey with the resources, mentorship, and global network needed to help them rapidly scale, create jobs, and address key global issues. Unreasonable and Barclays are proud to showcase the 15 entrepreneurs that have been identified as drivers of social and environmental change in the Americas. These innovators are providing possible solutions to the future of food, manufacturing, renewable energy, and more. Together, they’ve raised more than $285M in financing and operate in more than 20 countries. Join us as we continue to support and amplify their transformative efforts, fostering a brighter, more sustainable tomorrow for us all.

Aura Health . . . . . . . . . . . . . . . . . . . . . . . . . . 06 Brimstone . . . . . . . . . . . . . . . . . . . . . . . . . . . 08 Compact Membrane Systems . . . . . . . . . . 10 Compound Foods . . . . . . . . . . . . . . . . . . . . . 12 e-Zinc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Eureciclo . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Frost Methane Labs . . . . . . . . . . . . . . . . . . . 18 Hilab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Keel Labs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 NovoNutrients . . . . . . . . . . . . . . . . . . . . . . . 24 Proof . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Re-Nuble . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Rebellyous Foods . . . . . . . . . . . . . . . . . . . . . 30 unspun . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 VARIANT3D . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Aura Health Restoring the world’s mental wellness.

S ECTO R

Information and Communications Technology HQ

San Francisco, California, US

EN TRE PRE N E U R

Steve Lee

TI TL E

Co-Founder & CEO

aurahealth.io

Aura is the all-in-one app for mental wellness & sleep that provides the world’s most extensive mental wellness content library & community loved by over 7 million people. Unlike traditional meditation apps that provide one-size-fits-all content libraries created by a few coaches, Aura empowers a global network of coaches & therapists to create content, and leverages AI to continuously personalize its recommendations and help anyone find peace. Aura has also launched Aura Live, 1-1 coaching, and Aura Masterclass with celebrities & athletes. Aura Health is an SF-based startup backed by Cowboy Ventures, Reach Capital, UC Berkeley SkyDeck, and the founders and executives of companies such as Spotify, Facebook, Strava, Life360, WeWork, and Masterclass.

Steve is the Co-Founder and CEO of Aura Health. Passionate from childhood struggles with his mother’s illness and mental health, Steve co-founded Aura with his brother, Daniel, in 2017. In 2022, the brothers were recognized as recipients of Forbes 30 Under 30 - Social Impact. Before Aura, Steve spent numerous hours in labs and hospitals, co-founded two healthcare non-profit organizations, and led product teams at VC-backed Co-Founder & CEO software and machine-learning startups. Steve has a Master of Translational Medicine degree from UCSF and UC Berkeley.

Steve Lee

Brimstone Developing carbon-neutral Portland cement.

S ECTO R

Building and Construction Technology HQ

Oakland, California, US

Founded in 2019, Brimstone developed a breakthrough, low-cost, carbon-negative process for producing ordinary portland cement and SCM, another key ingredient in concrete. The world produces over 4 billion tons of cement annually. The problem is that cement production accounts for 7.5% of global CO2 emissions, with a total climate impact just behind cars. The Brimstone process uses carbon-free calcium silicate rock instead of limestone to deliver a product identical to conventional materials and cost-competitive at scale. Brimstone’s decarbonized cement meets ASTM C150 standards for ordinary portland cement and can be used anywhere conventional cement is used. As the only clean cement company making industry-standard portland cement without emissions, Brimstone’s process clears a path to eliminate cement’s climate footprint—transforming it from a climate problem into a climate solution.

EN TRE PRE N E U R

Cody Finke

TI TL E

Co-Founder & CEO

brimstone.energy

Cody Finke is the Co-Founder and CEO of Brimstone, a climate-tech company on a mission to decarbonize cement production. He holds a BA with distinction in Chemistry from Carleton College and a Ph.D. from Caltech, where he focused on electrochemistry and industrial decarbonization. Following his Ph.D., Cody conducted postdoctoral research at Lawrence Berkeley National Lab as a DOE-funded Cyclotron Road entrepreneurial fellow. Cody co-founded the Oakland, California-based Brimstone to decarbonize an industry that today accounts for 5.5% of global GHG emissions. Brimstone’s innovative solution has been recognized by the International Energy Agency, the Co-Founder & CEO Global Cleantech 100, Norrsken’s Impact 100 list, and Fast Company’s Most Innovative Companies in Energy and Sustainability.

Cody Finke

Compact Membrane Systems Making point source carbon capture a no-brainer.

S ECTO R

Climate Tech

Wilmington, Delaware, US

Compact Membrane Systems (CMS) has created a nearterm, low-risk, low-cost path to decarbonizing hardto-abate sectors and removing gigatons of cumulative CO2 from the atmosphere at less than $50 per ton. The company has developed a portfolio of decarbonization solutions using its advanced membrane technology: first in bolt-on applications for petrochemical plants and now expanding to a range of carbon capture applications, including steel, cement, and chemicals. CMS’s durable and effective membrane technology captures CO2 with drastically lower energy usage and smaller footprints than existing separation technologies on the market. Leveraging over two decades of membrane tech development and expertise honed in the company’s 10,000 sq ft lab in Wilmington, Delaware, CMS’s products enable the equitable creation of the materials we use while preserving the planet we need.

EN TRE PRE N E U R

Erica Nemser

TI TL E

CEO

compactmembrane.com

Erica brings commercial focus, change management, and go-to-market strategy and execution to her role as CEO of Compact Membrane Systems (CMS). Over the past eight years, she has transformed CMS from a domestic R&D lab to a globally active, commercially successful company, culminating in its recent Series A financing. Prior to leading CMS, Erica spent 14 years at McKinsey and Company, developing expertise in product and acquisition strategy, product launch, portfolio management, new company growth, and risk management strategy for innovative products with long development cycles. Erica led several internal strategic initiatives and implementations for McKinsey, including women’s talent and best practice consulting. She CEO received her BA in Economics from The Johns Hopkins University and her MA and PhD in Economics from the University of Pennsylvania.

Erica Nemser

Compound Foods Making coffee minus the beans.

S ECTO R

Food Technology

Founded in 2020, Compound Foods is a food science company based in San Francisco. Their first product, Minus Coffee, is coffee without coffee beans. Inspired by their Founder Maricel’s time in Costa Rica—where she saw firsthand the ecological impacts of traditional coffee farming—the company utilizes a proprietary fermentation platform that transforms low-value and low-carbon embodied feedstock into high-value products such as coffee. The taste is the same as traditional coffee, but the process uses 94% less water and emits 91% less greenhouse gas. Minus Coffee launched direct-to-consumer in January 2023. Since then, the product has received rave reviews and consistently sells out.

San Francisco, California, US

EN TRE PRE N E U R

Maricel Saenz

TI TL E

Founder & CEO

compound-foods.com

Maricel is the Founder and CEO of Compound Foods, a food-tech startup recreating coffee without coffee beans. Maricel is a Costa Rica native with a passion for sustainability and coffee. She has a Bachelor of Commerce from The University of British Columbia and attended Singularity University’s Global Solutions Program in 2017. Maricel has a background in finance and previously co-founded Nextbiotics, a synthetic biology startup addressing antibiotic resistance. She was featured in the Forbes 30 under 30 Social Impact category and has participated in numerous speaking events, including Founder & CEO TedX and SXSW. She has worked in international development in South Africa, and in Cambodia with Helen Keller International to empower women.

Maricel Saenz

e-Zinc Powering the energy transition.

S ECTO R

Energy Technology

Toronto, Ontario, Canada

EN TRE PRE N E U R

James Larsen

TI TL E

CEO

e-zinc.ca

e-Zinc is a purpose-driven energy storage solutions company that is winning domestic and international awards and stacking world-class investors and advisors. The company’s unique, zinc-based, long-duration energy storage technology enables a reliable transition away from fossil fuel-powered energy sources—and provides the platform for the world’s energy markets to be fully powered by renewable energy. By utilizing zinc as the base metal in their technology, they deliver a product that holds energy for multiple days and can safely and reliably perform in the world’s harshest environments. In addition, zinc is readily available and inexpensive because of its abundance, ubiquity, and recyclability. e-Zinc is dedicated to a zero-carbon future—a future to look forward to, with thriving nature and affordable, clean, and reliable energy for all.

James has over two decades of business and engineering leadership experience in cleantech and energy, including strategy, operations, finance, design, and engineering. As CEO of e-Zinc, James has successfully raised over $100 million for the company. He is responsible for formulating and executing the company’s strategic plan, and leading its commercialization journey. Before e-Zinc, James was Director of Business Development with MaRS Advanced Energy Centre, and before that, a management consult with Bain & Company. James also has many years of engineering experience in the renewable energy industry. James holds a BSc in Mechanical Engineering from CEO Queen’s University (Honours) and an MBA from the Ivey Business School at Western University (Dean’s List). James is also a registered Professional Engineer.

James Larsen

Eureciclo Connecting companies with recyclers to offset the environmental impact of packaging.

S ECTO R

Manufacturing and Supply Chain HQ

Bela Vista, São Paulo, Brazil

EN TRE PRE N E U R

Thiago Pinto

TI TL E

Founder & CEO

eureciclo.com.br

Eureciclo connects companies with recyclers to offset the environmental impact of packaging sold in Latin America. Founded in 2017, Eureciclo brings transparency and traceability to the reverse logistics industry. Through a proprietary mix of hardware and software technologies, the company has developed a method by which it can track the post-consumer packaging recycling chain. This approach helps screening centers ensure that recyclables arrive at the correct destination. Furthermore, it helps companies meet ESGs by verifying the amount of packaging they put into the market is offset by that same amount being recycled. Eureciclo’s results are legally enforceable and have ensured over 695,000 tons of post-consumer waste has been recycled correctly.

Thiago is a serial entrepreneur with strong experience throughout the impact sector and a focus on mobility and environmental services. He is skilled in business and market transformations, corporate development, mergers and acquisitions, and business modeling. He also boasts previous experience in strategic business consulting and private/public equity management. Before founding Eureciclo in 2017, Thiago was the CFO and Business Manager at the Morena Rosa Group and an associate at Tarpon Investimentos, both based in São Paulo, Brazil. He received his Founder & CEO MSc from Ecole Centrale de Marseille in France and his MBA from the Kellogg School of Management at Northwestern University.

Thiago Pinto

Frost Methane Labs Providing scalable climate change mitigation.

S ECTO R

Climate Tech

Oakland, California, US

Founded in 2019, Frost Methane Labs develops methaneflaring projects designed to shrink the impact of methane emissions from manure ponds, shut-down mines, and other natural sources that total 1.5–3.3 gigatons of CO2e annually. The company uses a combination of proprietary hardware and software to offer low-cost, targeted, large-scale climate change mitigation for medium-sized methane leaks. They deploy their technology at the leak site with minimal environmental impact, neutralizing the leaking methane to generate high-value carbon credits. These credits create financial opportunities and incentives in previously unregulated, unmonitored methane sources. Frost Methane has received funding from Lower Carbon Capital, L2 Ventures, Climate Capital, and Shared Future Fund.

EN TRE PRE N E U R

Olya Irzak

TI TL E

Founder & CEO

frostmethane.com

Olya is the Founder of Frost Methane Labs, a company that destroys continuous and concentrated methane emissions from unregulated sources. Olya is interested in large, underaddressed problems, which led her to methane and its strange—yet cumulatively significant— sources: permafrost methane vents, closeddown coal mines, and agricultural manure ponds. Before Frost Methane Labs, Olya was a system architect at Zola Electric, building minigrids in remote communities; a tech lead at Google X, developing early-stage climate projects in geothermal HVAC and long-duration storage; and a software team lead at Google Energy, focusing on smart grid technologies. Olya is also the architect of the Diamond List Founder & CEO and Cleantech Experts and a board member of Terraformation. She is a Mulago fellow, a kitesurfer, and speaks five languages.

Olya Irzak

Hilab Democratizing access to healthcare through localised lab testing.

S ECTO R

Equipment Medical Technology HQ

Cidade Industrial de Curitiba, Paraná, Brazil EN TRE PRE N E U R

Marcus Figueredo

TI TL E

CEO

hilab.com.br

Headquartered in Brazil, Hilab offers a remote diagnostic tool to make healthcare accessible everywhere. Their handheld devices, powered by AI and IoT, conduct quick tests that account for 85% of the most commonly administered tests. They bring the resources of the lab to distant, untouched places where others don’t venture. To date, Hilab has given over 6 million tests to 1.8 million Brazilians. Now, they’re setting their sights abroad. In 2021, they introduced the world’s smallest CBC tester, the Hilab Lens. The Lens uses fingerstick blood collection to provide diagnostic results from anywhere in just 30 minutes. In 2022, the Lens company received the “Gold” award from the iF DESIGN Awards—widely considered to be the world’s most influential design award.

Marcus is the CEO, Chief Scientist, and Founder of Hilab, a Brazilian health tech specializing in point-of-care testing devices. His mission is simple: increase access to lab tests. With a background in Computer Engineering and a Ph.D. in AI for health, Marcus has contributed scientific papers internationally and secured health-related patents. He founded Hilab in 2004, and under his leadership, the company’s R&D team has received numerous innovation and design awards. He’s been recognized as an Endeavor CEO Entrepreneur and has taken the stage as a TEDx speaker. At his core, Marcus is focused on sparking change in health and technology.

Marcus Figueredo

Keel Labs Building nextgeneration sustainable materials derived from nature.

S ECTO R

Manufacturing and Supply Chain HQ

Morrisville, North Carolina, US EN TRE PRE N E U R

Tessa Callaghan

TI TL E

Co-Founder & CEO

keellabs.com

Keel Labs began in 2017 as AlgiKnit, creating oceanfocused materials built from renewable resources. In 2022, Keel Labs was established as a platform for innovation, broadening its vision for the potential of the ocean to accelerate the planet’s development towards a more sustainable future. Driven by the exploration of novel resources from the ocean, Keel Labs functions as a hub for the next generation of climate-focused solutions derived from nature. The company works at the nexus of design, science, and engineering to create impact-driven materials that harness the power of the ocean. Kelsun yarn, Keel Labs’ flagship product, is a seaweed-based yarn with a significantly lower environmental footprint than conventional fibers.

Tessa is the Co-Founder and CEO of Keel Labs, an innovation platform expanding the potential of the ocean to accelerate the planet’s development towards a more sustainable future. With a background in design and innovation, Tessa is leading the global expansion and adoption of Keel Labs’ flagship product, Kelsun. Working across the value chain, Tessa connects and aligns partners, brands, and manufacturers to achieve their sustainability goals and transform the textile ecosystem. Her mission is to create a bridge between disparate fields, enabling innovative solutions at a global scale Before Co-Founding Keel Labs, Tessa worked in textile development and Co-Founder & CEO apparel design in various industries, experiencing first-hand the challenges and requirements for the industry to deploy lasting, positive change.

Tessa Callaghan

NovoNutrients Transforming carbon dioxide emissions into alternative protein food and feed ingredients.

S ECTO R

Climate Technology

Sunnyvale, California, US

NovoNutrients is passionate and committed to impacting industrial Carbon Capture Utilization. Its ambitious but achievable mission is to provide sustainable, high-quality protein ingredients for food and feed, turning a significant global environmental issue into a profitable solution. By harnessing advanced biotechnology, NovoNutrients captures carbon emissions and uses hydrogen from clean energy sources to produce profitable, high-quality protein. It is a more affordable, nutritious, and sustainable source of protein compared to pork, chicken, fish, and plantbased proteins for food or feed use. NovoNutrients has invested $15M in creating a capital-light technology and business model based on licensing and supporting its innovative process and off-take agreements. Their method combats climate change and turns these emissions into a valuable, in-demand product.

EN TRE PRE N E U R

David Tze

TI TL E

CEO

novonutrients.com

David leads the food and feed for NovoNutrients, a CO2 bio company that’s cleanly transforming carbon dioxide emissions into high-quality, affordable alternative protein ingredients. In 2017, David became its investor, pivoter, and CEO. David had been the sole manager of the seed fund Aquacopia, with five companies focused on aquaculture. The fund led investments into Open Blue, InnovaSea, and Futuna. Including a prior startup, NetworkOil, that David co-founded as CTO, those six companies raised more than $250M. NetworkOil was an online industrial marketplace later renamed Network International and acquired by Liquidity Services (NASDAQ: LQDT). After CEO graduating from Princeton, David began his career in internet pioneering general management, corporate development, and technology sales.

David Tze

Proof Creating the next evolution of business intelligence through verified ESG and impact data.

S ECTO R

Information and Communications Technology HQ

Middletown, Delaware, US

EN TRE PRE N E U R

Fleur Heyns

TI TL E

Co-Founder & CEO

proof.io

Founded by FinTech and Impact experts in 2021, Proof is a US-based impact intelligence company with a rapidly accelerating global presence. The company focuses on providing access to the world’s largest consolidated set of reliable, material, and high-quality ESG and impact data for private markets. Customers can translate their ESG and impact data into strategic insights, create sustainability benchmarks, and discover how improving sustainability can improve their businesses. Quickly establishing itself as one of the leading providers of sustainability analytics across the globe, Proof’s driving vision is to serve as the largest force multiplier for creating positive, meaningful change through business.

Fleur wrote an essay on vaccines for coronaviruses (HIV) in 1992 as part of entry to Oxford University to read Biochemistry. After graduating, she started her investment banking career in London at JP Morgan. Between 2000–2007, Fleur ran Global Trader, the “Robinhood” of Africa under the EasyEquities brand. After exiting, she attended Skoll and pivoted towards ESG and Impact investing and entrepreneurship. She seeded funds like the world-leading ESG fund Osmosis Investment Management and EdTech fund Emerge; became the CEO of Proof, an Impact Data intelligence company; joined as Chair of Pyrpose, a next-generation climate investment platform; and became an Co-Founder & CEO active board member of OKA, the Carbon Credit Insurance Company. Fleur and her husband Gerrit live in Cape Town, looking after four kids and King Slevin, the dog.

Fleur Heyns

Re-Nuble Developing peat-free inputs and organic hydroponic nutrients to grow sustainably.

S ECTO R

Agricultural Technology

New York, New York, US

EN TRE PRE N E U R

Tinia Pina

TI TL E

Founder & CEO

re-nuble.com

Re-Nuble is an NYC-based, closed-loop agtech company that uniquely converts food waste into fertilizers for indoor growers. Using their proprietary organic cycling science approach, Re-Nuble converts unrecoverable vegetative food byproducts into a suite of liquid biological fertilizer blends and crop residue into a peat-free horticultural substrate (known as “grow media”). The ReNu Terra™ product line is a fully home and industrial compostable inert growth medium, and Away We Grow® uses a proprietary method to create water-soluble, liquid organic hydroponic nutrients. The company has design edits products for indoor growers like greenhouses, vertical farms, and more. Priced competitively, Re-Nuble is ultimately replacing synthetic agriculture inputs to reduce growers’ carbon footprint and water consumption while increasing crop yields.

Tinia has a B.S. in Business Information Technology from Virginia Tech. Prior to founding Re-Nuble, she began her career in sustainability as a student pursuing a Masters of Science at Columbia University. A strong advocate for sustainable waste management and closed-loop agriculture, she has been involved in management and business development roles within the sustainability industry for at least ten years and in finance for eight years. She has worn many hats in her career—startup executive, staff accountant, financial analyst, and business developer—with Founder & CEO a consistent focus on helping indoor growers use unique and distributed technologies to extract optimal value from organic waste streams.

Tinia Pina

Rebellyous Foods Dominating the future of chicken.

S ECTO R

Food Technology

Seattle, Washington, US

EN TRE PRE N E U R

Christie Lagally

TI TL E

Founder & CEO

rebellyous.com

Founded in Seattle, WA, Rebellyous Foods is a food manufacturing technology and production company with the mission of catapulting high-quality plant-based meat production toward price parity with animal-based meat. The company implements its fully patented, novel food manufacturing equipment and processes in largescale production to produce low-cost, plant-based meat at high volumes. The company achieves these goals through the design and deployment of high-throughput manufacturing automation, “smart” production centers— including the fully patented “Mock Two” system—and the development and utilization of new, innovative, and lowenergy manufacturing tools. Working closely with industry partners, Rebellyous Foods makes plant-based meat sustainable, affordable, and widely available.

Christie is the Founder and CEO of Rebellyous Foods, a Y-Combinator backed food production technology startup working to make plantbased chicken price-competitive with conventional chicken. Lagally is a mechanical engineer and the holder of multiple patents in manufacturing technology. She began her career in the aerospace industry, working on testing, designing, and manufacturing commercial airplanes at Boeing. Lagally leads the design and deployment of novel manufacturing equipment that addresses the two most significant obstacles facing the plant-based meat Founder & CEO industry: cost and quality-at-scale. She holds a BA in Organizational Psychology, a BS in Mechanical Engineering, and an MS in Mechanical Engineering.

Christie Lagally

unspun Building the world’s first 3D weaving technology for fashion.

S ECTO R

Manufacturing and Supply Chain HQ

Emeryville, California, US

EN TRE PRE N E U R

Walden Lam

TI TL E

Co-Founder & CEO

unspun.io

Founded in 2017, unspun is a fashion-tech BCorp that creates apparel on demand. The company’s proprietary 3D weaving and digital-fit technology make it the fastest (10 minutes), cleanest (>50% emissions reduction), and most cost-competitive way (<$20) to make woven apparel. The technology weaves yarns directly into finished products via 3D weaving and machine learning; this combination allows production to happen in a zero-waste, zero-inventory, and zero-lead-time fashion. The company has built a micro-factory in Oakland, California, is expanding into Europe, and is partnering with the world’s most forward-thinking brands by bringing manufacturing on/ near-shoring, drastically shortening supply chains, and reducing waste and overproduction.

Walden began his career in climate during the 2008 financial crisis, consulting with a local utility company as his first client. Since then, he has served many consumer-facing companies as a strategist and consultant, focusing on growth and supply chains in the APAC region. Before founding unspun in 2017, Walden was the APAC Head of Strategy for lululemon. He has previously worked as a strategist and analyst for IDEO, GGV Capital, and Goldman Sachs. He received an MBA from the Stanford Graduate School of Business and his BBA from the Chinese University of Hong Kong. He grew up in Hong Kong.

Walden Lam Co-Founder & CEO

VARIANT3D Empowering designers and manufacturers to rapidly create 3D-knit textiles with zero waste.

S ECTO R

Manufacturing and Supply Chain HQ

Malibu, California, US

EN TRE PRE N E U R

Garrett Gerson

TI TL E

Founder & CEO

variant3d.io

Headquartered in Malibu, California, VARIANT3D is on the vanguard of the textiles sector. The company’s presence is defined by cutting-edge, hyper-local, nearzero-waste, and customizable 3D knitting technology, driving the industry towards a sustainable horizon. At VARIANT3D’s core lies the revolutionary LOOP 3D CAD/CAM software, which fundamentally redefines manufacturing into an environmentally conscious and all-encompassing ecosystem. Through its dedication to fostering interdisciplinary collaboration and unyielding innovation, VARIANT3D is leading the charge in realizing large-scale 3D textile printing, ensuring accessibility on a universal scale. VARIANT3D embodies a future in which textiles are digitally crafted through 3D printing for precision and excellence.

Garrett is a distinguished entrepreneur who rose from early involvement in his family’s hospitality business to become CEO by age 25, driving sales from $6.5M to $60M. He diversified that business by entering fashion and textile manufacturing and achieving $10M in revenue, with global distribution to 350 stores. As VARIANT3D’s Founder, he pioneers textile engineering innovation with 3D knitting, promoting affordable, nearzero-waste production. With a skilled team, he established an end-to-end toolchain. Garrett’s background includes global economics, knitwear engineering, and material science. Active in XPRIZE Founder & CEO and Calamigos Ranch Corp, a 15year YPO member, he’s a leading entrepreneur known for visionary achievements and sustainability efforts.

Garrett Gerson

O N B E H A L F O F U S , T H A N K YO U .

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