C111123313331323113313331333133313331323132311233133313112211232311331   >>    C11112331333132311331333133313331333132313231123313331311221123231133   <<    C111123313331323113313331333133313331323132311233133313112211232311333   >>      C111123313331323113313331333133313331323132311233133313112211232311332   >>