C11111333133313232233133313331333133313331311331333132323321311   >>    C1111133313331323223313331333133313331333131133133313232332131   <<    C11111333133313232233133313331333133313331311331333132323321313   >>      C11111333133313232233133313331333133313331311331333132323321312   >>