# [Perl 6], <s>27</s> 24 bytes

*-3 bytes thanks to nwellnhof*

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

 *.uc.comb(/<:L>/).Set/26

[Try it online!][TIO-jx65v96u]

[Perl 6]: https://github.com/nxadm/rakudo-pkg
[TIO-jx65v96u]: https://tio.run/##HYy9DoIwGEV3nuKGgagxJXFg8AcXow5u@gKlfGilpVhatb58RZd7knOS25NVRdQBWYMN4ox5wYTR1SRfL09lPmVncvmiiKtEyY6GsmRZM87AQ0x3skYwHr13P1p0XBNkB3cjHEylyME02EtLcxy5tWGbYkx8aKmG4EqrwJLLaB5eihaVNa8OjXnj7nU/wDzJ/r8U/wTU5voF "Perl 6 – Try It Online"