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- Python
- JavaScript
- PHP
- Java
- Lua
- CoffeeScript
- C++
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- Julia (Beta)
- Kotlin
- Rust
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- Go
- Scala
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- COBOL (Beta)
- OCaml (Beta)
- C
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- R (Beta)
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- TypeScript
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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.