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- JavaScript
- Python
- Haskell
- Ruby
- C#
- C
- CoffeeScript
- PHP
- Elixir
- Factor (Beta)
- Lua
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- COBOL (Beta)
- Rust
- D (Beta)
- Go
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- R (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.