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# [Raku], 18 bytes

<!-- language-all: lang-perl6 -->

    {m:g:i/<[aeiou]>/}

Implicitly matches the topic variable with the regex

[Try it online!][TIO-l93be3hi]

[Raku]: https://raku.org/
[TIO-l93be3hi]: https://tio.run/##LYzLCsIwEEV/JYQudGN3LkotuOhCEAUfKxGZwtQWDNExswjit8dc7Az3cjhD8mR5LJOLpui9NyuTPq66V2NZX4hHr9em/CacZsVtvnhTNL0XU1tr7CvnmHMYYhhcBkIkoIPkFgJLgA8EEwTMTtGKN47BTjm3Mow68Jq43Yx7r2d8N03GbhrY7r@wE8NuQys7OrFt0g8 "Perl 6 – Try It Online"
```
{m:g:i/<[aeiou]>/}
{                }  : anonymous code block
 m                  : match operator
  :g:i              : regex adverbs, global and ignorecase
      /<[aeiou]>/   : the regex using a character class of vowels
```