C1111233131211111211113313331333133313311211111333133313331333133313221231111   >>    C111123313121111121111331333133313331331121111133313331333133313331322123111   <<    C1111233131211111211113313331333133313311211111333133313331333133313221231113   >>      C1111233131211111211113313331333133313311211111333133313331333133313221231112   >>