C111123313331323113313331333133313331323132311233133313232211233321   >>    C11112331333132311331333133313331333132313231123313331323221123332   <<    C111123313331323113313331333133313331323132311233133313232211233323   >>      C111123313331323113313331333133313331323132311233133313232211233322   >>