ruban=o!
for n in `seq 1 100`; do
	case ${ruban:0:1} in
		'o')
			ruban=$ruban'ooo';;
		'!')
			ruban=$ruban'!';;
	esac
	ruban=${ruban:1}
	if [ ${ruban:0:1} = ! ]
		then echo ${#ruban}
	fi
done