This might be a nice thing to obfuscate answers to quizzes (better than \rotatebox[c]{180}{...}). (I understand that this is trivial using LuaTeX, but I'd be interested in a generic TeX solution. Most probably I could write one myself - it's not that difficult - but being a bit lazy, I don't want to reinvent the wheel.)

  • If you wanted to obliterate, rather then encode the answer, you could look at the censor package. – Steven B. Segletes Jun 18 '13 at 18:48

Yes, it is: the rotchiffre package by Heiko Oberdiek.

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