C111123313331323113313331333133313331323132311233133313112211231213321   >>    C11112331333132311331333133313331333132313231123313331311221123121332   <<    C111123313331323113313331333133313331323132311233133313112211231213323   >>      C111123313331323113313331333133313331323132311233133313112211231213322   >>