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- C#
- Python
- Ruby
- JavaScript
- Haskell
- Java
- CoffeeScript
- Crystal
- F#
- C++
- PHP
- Go
- COBOL (Beta)
- Julia (Beta)
- Lua
- C
- TypeScript
- Rust
- D (Beta)
- Factor (Beta)
- Swift
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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.