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- Python
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- Java
- CoffeeScript
- Haskell
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- Elixir
- PHP
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- Crystal
- Dart
- Julia (Beta)
- R (Beta)
- Reason (Beta)
- Factor (Beta)
- Elm (Beta)
- Objective-C (Beta)
- Lua
- F#
- Swift
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- Forth (Beta)
- Groovy
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- Scala
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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.