C111123313331323113313331333133313231333132311312111133131133133313221322232311   >>    C11112331333132311331333133313331323133313231131211113313113313331322132223231   <<    C111123313331323113313331333133313231333132311312111133131133133313221322232313   >>      C111123313331323113313331333133313231333132311312111133131133133313221322232312   >>