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Japt v2.0a0, 3 bytes o\v Try it o\v :Implicit input of string o :Keep only \v :RegEx /[aeiou]/gi
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#1: Initial revision
# [Japt](https://github.com/ETHproductions/japt) v2.0a0, 3 [bytes](https://en.wikipedia.org/wiki/ISO/IEC_8859-1) o\v [Try it](https://petershaggynoble.github.io/Japt-Interpreter/?v=2.0a0&code=b1x2&input=ImFMdEVyTmFUZSI) o\v :Implicit input of string o :Keep only \v :RegEx /[aeiou]/gi