C111123313121111121111331333133313331333131233133313232313332233133322233211   >>    C11112331312111112111133133313331333133313123313331323231333223313332223321   <<    C111123313121111121111331333133313331333131233133313232313332233133322233213   >>      C111123313121111121111331333133313331333131233133313232313332233133322233212   >>