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- Java
- JavaScript
- Python
- C++
- Ruby
- C#
- Haskell
- Clojure
- Elixir
- Rust
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- COBOL (Beta)
- C
- λ Calculus (Beta)
- Factor (Beta)
- Lua
- Groovy
- CoffeeScript
- R (Beta)
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- Go
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- Kotlin
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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.