C111123313121111121111331333133313331333133313331333133313331311233123231   >>    C11112331312111112111133133313331333133313331333133313331333131123312323   <<    C111123313121111121111331333133313331333133313331333133313331311233123233   >>      C111123313121111121111331333133313331333133313331333133313331311233123232   >>