C11111333133313232233133313331333133313331312111133133312111112111133223131   >>    C1111133313331323223313331333133313331333131211113313331211111211113322313   <<    C11111333133313232233133313331333133313331312111133133312111112111133223133   >>      C11111333133313232233133313331333133313331312111133133312111112111133223132   >>