C11111333133313232233133313331333133313331312111133133313222211   >>    C1111133313331323223313331333133313331333131211113313331322221   <<    C11111333133313232233133313331333133313331312111133133313222213   >>      C11111333133313232233133313331333133313331312111133133313222212   >>