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- JavaScript
- C++
- C
- COBOL (Beta)
- Python
- Java
- Ruby
- Rust
- C#
- Dart
- PHP
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- Swift
- Lua
- Haskell
- Crystal
- NASM
- Kotlin
- Scala
- Julia (Beta)
- Go
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- Factor (Beta)
- D (Beta)
- Clojure
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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.