C111123313331323113313331333133313331323133113313231333133313232311212311   >>    C11112331333132311331333133313331333132313311331323133313331323231121231   <<    C111123313331323113313331333133313331323133113313231333133313232311212313   >>      C111123313331323113313331333133313331323133113313231333133313232311212312   >>