C1111133313331323223313331333133313331333232233133112111133131231323321111   >>    C111113331333132322331333133313331333133323223313311211113313123132332111   <<    C1111133313331323223313331333133313331333232233133112111133131231323321113   >>      C1111133313331323223313331333133313331333232233133112111133131231323321112   >>