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switch (someChar) { case 'a': actionOnA; break; case 'x': actionOnX; break; case 'y': case 'z': actionOnYandZ; break; default: actionOnNoMatch;}

In Bash:

case $someChar in a) actionOnA ;; x) actionOnX ;; [yz]) actionOnYandZ ;; *) actionOnNoMatch ;;esac

In Lisp:

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