C11111333133313232233133313331333131121133131133133313232223131211   >>    C1111133313331323223313331333133313112113313113313331323222313121   <<    C11111333133313232233133313331333131121133131133133313232223131213   >>      C11111333133313232233133313331333131121133131133133313232223131212   >>