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