#!/bin/sh
case $# in
0) ( echo "usage: $0 FILE ..."; echo "mv FILE file" ) 1>&2 ; exit 1;;
esac
opt='A-Z a-z'
case $0 in
*toupper) opt='a-z A-Z'
esac


for i
do
	new=`echo $i | tr $opt`
	test $new.Z != $i.Z && mv -f $i $new
done