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#Can I loop with a string?
steel tangleBOT
thin dome
you get letter from cin before you enter the loop, but once you're in there you never use cin again so letter doesn't have an opportunity to change
so your loop runs forever, which is what I assume you were having
(in general you should make sure to mention observed vs. expected behaviour in your question, so people don't have to take guesses :p )
lone idol
ok thank u