C111123313331323113313331333133313231333132311312111133133313232211312311   >>    C11112331333132311331333133313331323133313231131211113313331323221131231   <<    C111123313331323113313331333133313231333132311312111133133313232211312313   >>      C111123313331323113313331333133313231333132311312111133133313232211312312   >>