C1111233131211111211113313331333133313331333133313331333133313223321111   >>    C111123313121111121111331333133313331333133313331333133313331322332111   <<    C1111233131211111211113313331333133313331333133313331333133313223321113   >>      C1111233131211111211113313331333133313331333133313331333133313223321112   >>