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- JavaScript
- CoffeeScript
- Ruby
- Python
- C#
- Julia (Beta)
- Crystal
- R (Beta)
- C
- Elixir
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- TypeScript
- C++
- Haskell
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- Prolog (Beta)
- Clojure
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Start training on this collection. Each time you skip or complete a kata you will be taken to the next kata in the series. Once you cycle through the items in the collection you will revert back to your normal training routine.