a2:= O & gt;馬(C,10)和L & lt=MA(C,10)且C & gt馬(C,10);
a3:= O & gt;馬(C,20)和L & lt=MA(C,20)且C & gt馬(丙,20);
a4:= O & gt;馬(C,60)和L & lt=MA(C,60)且C & gt馬(丙,60);
XG:A1或A2或A3或A4;