#!/bin/sh
case "$1$2" in
'[A-Z][a-z]') exec /afs/athena.mit.edu/project/gnu/gbin/tr '[:upper:]' '[:lower:]';;
'[a-z][A-Z]') exec /afs/athena.mit.edu/project/gnu/gbin/tr '[:lower:]' '[:upper:]';;
esac
exec /afs/athena.mit.edu/project/gnu/gbin/tr "$@"