C111123313121111121111331333133313331311331333131211113313331333133313222212131   >>    C11112331312111112111133133313331333131133133313121111331333133313331322221213   <<    C111123313121111121111331333133313331311331333131211113313331333133313222212133   >>      C111123313121111121111331333133313331311331333131211113313331333133313222212132   >>