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- JavaScript
- CoffeeScript
- Python
- C#
- PHP
- VB (Beta)
- C++
- Go
- COBOL (Beta)
- Haskell
- Factor (Beta)
- Ruby
- C
- Rust
- D (Beta)
- Scala
- BF (Beta)
- F#
- Clojure
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.