C1111233131211111211113313331333133313232313331333133313223313132111   >>    C111123313121111121111331333133313331323231333133313331322331313211   <<    C1111233131211111211113313331333133313232313331333133313223313132113   >>      C1111233131211111211113313331333133313232313331333133313223313132112   >>