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- Haskell
- Python
- Ruby
- Clojure
- CoffeeScript
- C++
- JavaScript
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- COBOL (Beta)
- C
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- Java
- Elixir
- PHP
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- Julia (Beta)
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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.