C111112111133131121133133313331333132213331333131133133313233313112113123311   >>    C11111211113313112113313331333133313221333133313113313331323331311211312331   <<    C111112111133131121133133313331333132213331333131133133313233313112113123313   >>      C111112111133131121133133313331333132213331333131133133313233313112113123312   >>