C1111233131211111211113313331333133313331333133313331333133313121121111   >>    C111123313121111121111331333133313331333133313331333133313331312112111   <<    C1111233131211111211113313331333133313331333133313331333133313121121113   >>      C1111233131211111211113313331333133313331333133313331333133313121121112   >>