C11111333133313232233133313331333133112111112113313331333132333131323131211   >>    C1111133313331323223313331333133313311211111211331333133313233313132313121   <<    C11111333133313232233133313331333133112111112113313331333132333131323131213   >>      C11111333133313232233133313331333133112111112113313331333132333131323131212   >>