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- Python
- Java
- JavaScript
- Ruby
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- C#
- Crystal
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- Elm (Beta)
- Julia (Beta)
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- Swift
- Elixir
- C
- NASM
- COBOL (Beta)
- C++
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- D (Beta)
- Rust
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- Pascal (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.