#!/bin/sh -
PATH=/bin:/usr/bin; export PATH

# rot13 - Usenet-standard, simple text encryption filter
# Steve Kinzler, kinzler@cs.indiana.edu, Apr 93
# http://www.cs.indiana.edu/~kinzler/home.html#unix

exec tr '[A-M][N-Z][a-m][n-z]' '[N-Z][A-M][n-z][a-m]'