C111123313121111121111331333133313331333131233133313231311223321211   >>    C11112331312111112111133133313331333133313123313331323131122332121   <<    C111123313121111121111331333133313331333131233133313231311223321213   >>      C111123313121111121111331333133313331333131233133313231311223321212   >>