C111112111133131121133133313331333132213331333131133133313233313232212111   >>    C11111211113313112113313331333133313221333133313113313331323331323221211   <<    C111112111133131121133133313331333132213331333131133133313233313232212113   >>      C111112111133131121133133313331333132213331333131133133313233313232212112   >>