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- JavaScript
- CoffeeScript
- Haskell
- Python
- Ruby
- Java
- OCaml (Beta)
- Go
- PHP
- C++
- C#
- Elixir
- VB (Beta)
- COBOL (Beta)
- Scala
- Kotlin
- Clojure
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- D (Beta)
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- λ Calculus (Beta)
- F#
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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.