m3:=ma(c,60);
a1:=if(cross(m1,m2),1,0);
a2:=if(cross(m1,m3),1,0);
a3:=if(cross(m2,m3),1,0);
b1:=count(a1+a2+a3,32);
b2:=hhv(c,31);
b4:if(b1 =3 and c =b2,1,0);

m3:=ma(c,60);
a1:=if(cross(m1,m2),1,0);
a2:=if(cross(m1,m3),1,0);
a3:=if(cross(m2,m3),1,0);
b1:=count(a1+a2+a3,32);
b2:=hhv(c,31);
b4:if(b1 =3 and c =b2,1,0);

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