int main()
{int a=1,b=1,c=1,d=1,e=1,f=1;
scanf("%d %d %d %d %d %d",&a,&b,&c,&d,&e,&f);
  while (a+b+c+d+e+f!=0) 
 {printf("%d\n",(12+d-a)*3600+(e-b)*60+f-c);scanf("%d %d %d %d %d %d",&a,&b,&c,&d,&e,&f);
  
 }
 return 7;
}