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