C1111233131211111211113313331333133313331333133313331333133313223211111   >>    C111123313121111121111331333133313331333133313331333133313331322321111   <<    C1111233131211111211113313331333133313331333133313331333133313223211113   >>      C1111233131211111211113313331333133313331333133313331333133313223211112   >>