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- Java
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- Python
- Crystal
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- Julia (Beta)
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- TypeScript
- Rust
- Go
- Lua
- Scala
- Fortran (Beta)
- NASM
- Haskell
- Dart
- C++
- C
- COBOL (Beta)
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- Swift
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- Groovy
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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.