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- JavaScript
- Fortran (Beta)
- Python
- C#
- PHP
- Ruby
- C
- NASM
- Julia (Beta)
- Racket
- TypeScript
- C++
- R (Beta)
- CoffeeScript
- Crystal
- COBOL (Beta)
- Haskell
- Scala
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.