C111112111133131121133133313331333131333132322331333131133133311231   >>    C11111211113313112113313331333133313133313232233133313113313331123   <<    C111112111133131121133133313331333131333132322331333131133133311233   >>      C111112111133131121133133313331333131333132322331333131133133311232   >>