C111112111133131121133133313331333133313331323133313331333131133133313123212211   >>    C11111211113313112113313331333133313331333132313331333133313113313331312321221   <<    C111112111133131121133133313331333133313331323133313331333131133133313123212213   >>      C111112111133131121133133313331333133313331323133313331333131133133313123212212   >>