int main(){
	int a,b,c,d,e,f,x,i;
	int s;
	for(i=0;a!=0;i++){
		s=0;
		scanf("%d %d %d %d %d %d",&a,&b,&c,&d,&e,&f);

s=(12+d-a-1)*3600+(60-b-1)*60+(60-c)+e*60+f;

if(a!=0){printf("%d\n",s);}
else{printf("\n");}
	}

return 0;
}
