C1111233131211111211113313331333133313331122212111112111112111133133313232211   >>    C111123313121111121111331333133313331333112221211111211111211113313331323221   <<    C1111233131211111211113313331333133313331122212111112111112111133133313232213   >>      C1111233131211111211113313331333133313331122212111112111112111133133313232212   >>