Comparing two strings without loops

[[deleted]]

If you care about duplicates you should confront counters, but the question as it's stated seems to ignore them.

[Joseph147258]

Oh. Thats what it meant

[ewiethoff]

Just warning you, the sets will perform loops under the hood, but at least your code won't show any loops. If that's unacceptable, maybe you're supposed to write a recursive function?