err() {
	echo $1
	echo "exiting.."
	exit 1
}

input() {
	local input
	local found="0"
	echo "$1 $2"
	read input
	for i in $2; do
		if [ "$i" == "$input" ]; then
			found=1
		fi
	done
	if [ "$found" == "0" ]; then
		err "$input: $3"
		return 1
	fi
	output="$input"
}

header() {
	echo ""
	echo "#### $1"
}