C312312111133131212111133133313331333133112113313331333223313211   >>    C31231211113313121211113313331333133313311211331333133322331321   <<    C312312111133131212111133133313331333133112113313331333223313213   >>      C312312111133131212111133133313331333133112113313331333223313212   >>