C111123313331323113313331333133313331323132311233133313112221121   >>    C11112331333132311331333133313331333132313231123313331311222112   <<    C111123313331323113313331333133313331323132311233133313112221123   >>      C111123313331323113313331333133313331323132311233133313112221122   >>