C111123313331323113313331333133313331323132311233133313112231312321   >>    C11112331333132311331333133313331333132313231123313331311223131232   <<    C111123313331323113313331333133313331323132311233133313112231312323   >>      C111123313331323113313331333133313331323132311233133313112231312322   >>