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

		