> //测试数据都对，我也想了几组，但提交还是我wrong
> #include<iostream>
> 
> using namespace std;
> 
> int main()
> {
> 	int p,e,i,d;
> 	int k,t=0;
> 
> 	while(cin>>p>>e>>i>>d&&(p!=-1||e!=-1||i!=-1||d!=-1))
> 	{
> 		p=p%23;e=e%28;i=i%33;
> 		k=d;
> 		t++;
> 		while(k<=21252)
> 		{
> 			k++;
> 			if((k-p)%23==0&&(k-e)%28==0&&(k-i)%33==0)
> 			{
> 				break;
> 			}
> 		}
> 		cout<<"Case "<<t<<": the next triple peak occurs in "<<k-d<<" days.\n";
> 	}
> 	return 0;
> }