#!/bin/sh

CAL="/usr/bin/cal"

case $# in
	0) ${CAL};;
	1) [ $1 -gt 12 ] && $CAL $1 || $CAL $1 `date +%Y`;;
	2) [ $1 -gt 12 ] && $CAL $2 $1 || $CAL $1 $2;;
	*) echo "Too many parameters"
esac