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Member since Jan 27, 2016

the first letter becomes the last letter, the second letter becomes the second-to-last letter, and so on

This definition means string reverse rather than rotation, while you apparently meant right (or clockwise) string rotation which is:
1st character becomes the 2nd, last ones becomes the 1st, repeat until the first string will become equal to the second string. As to your sample:
hello -> ohell -> lohel -> llohe

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