echo -n "Enter A, B or C: "
read letter
case "$letter" in
	1|a|A)
	echo "You entered A"
	;;
	2|b|B)
	echo "You entered B"
	;;
	3|c|C)
	echo "You entered C"
	;;
	*)
	echo "You did not enter A, B, C"
	;;
esac