}
double disptoline(point p,line l) { return fabs(xmult(p,l.a,l.b))/distance(l.a,l.b); }
int main() { int i,j; char d; point aa,bb,cc; scanf(\ scanf(\ int dd=d-'A'; cc.x=(dd%3)*172.5+2.5; cc.y=(dd/3)*170+2.5; line l; l.a=bb,l.b.x=bb.x-1,l.b.y=(bb.x-cc.x)/(bb.y-cc.y)+bb.y; if(opposite_side(aa,cc,l)&&disptoline(aa,l)-5>eps) printf(\ else printf(\ return 0; }