C111123313121111121111331333133313331323231333133313331311233222211   >>    C11112331312111112111133133313331333132323133313331333131123322221   <<    C111123313121111121111331333133313331323231333133313331311233222213   >>      C111123313121111121111331333133313331323231333133313331311233222212   >>