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- JavaScript
- C++
- Ruby
- Python
- Crystal
- Haskell
- C#
- C
- Prolog (Beta)
- Groovy
- TypeScript
- Julia (Beta)
- COBOL (Beta)
- PHP
- Dart
- Lua
- Java
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- Clojure
- F#
- OCaml (Beta)
- Go
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- Reason (Beta)
- Racket
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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.