C11111333133313232233133313331333131133131331121111133311212111   >>    C1111133313331323223313331333133313113313133112111113331121211   <<    C11111333133313232233133313331333131133131331121111133311212113   >>      C11111333133313232233133313331333131133131331121111133311212112   >>