> #include<cstdio>
> int main()
> {
> 	int a,b,c,d,i,k=0;
> 	while (1)
> 	{
> 	k++;
> 	scanf("%d%d%d%d",&a,&b,&c,&d);
> 	if (a==-1 && b==-1 && c==-1 &&d==-1)  return 0;
> 	i=1;
> 	while (1)
> 	{
> 		if((i-a)%23==0 && (i-b)%28==0 &&(i-c)%33==0) break;
> 		i++;
> 	}
> 	if(i<d) i+=23*28*33;
> 	printf("Case %d: the next triple peak occurs in %d days.\n",k,i-d);
> 	}
> 	return 0;
> }