C111123313121111121111331333133313331333131233133313311232313232223321221   >>    C11112331312111112111133133313331333133313123313331331123231323222332122   <<    C111123313121111121111331333133313331333131233133313311232313232223321223   >>      C111123313121111121111331333133313331333131233133313311232313232223321222   >>