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- JavaScript
- Haskell
- Python
- Ruby
- CoffeeScript
- C#
- Java
- Elixir
- Swift
- F#
- Racket
- Crystal
- C
- COBOL (Beta)
- Rust
- TypeScript
- Scala
- Clojure
- C++
- PHP
- OCaml (Beta)
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- Shell
- Kotlin
- Julia (Beta)
- PowerShell (Beta)
- Go
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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.