C31231211111133131211113313331333133313331323133313232233132332211   >>    C3123121111113313121111331333133313331333132313331323223313233221   <<    C31231211111133131211113313331333133313331323133313232233132332213   >>      C31231211111133131211113313331333133313331323133313232233132332212   >>