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- Ruby
- Python
- JavaScript
- COBOL (Beta)
- TypeScript
- C++
- Haskell
- C#
- Java
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- Elixir
- PHP
- Crystal
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- C
- Swift
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- R (Beta)
- Shell
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- Kotlin
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- NASM
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.