> #include <iostream>
> #include <stdlib.h>
> 
> using namespace std;
> 
> int main(int argc, char *argv[])
> {
>   int p,e,i,d,j,k=1;
>   cin>>p>>e>>i>>d;
>   while(p!=-1)
>   {
>   p=p%23;e=e%28;i=i%33;
>   for(j=d+1;;j++)if((j-p)%23==0&&(j-e)%28==0&&(j-i)%33==0) break;
>   cout<<"Case "<<k<<": the next triple peak occurs in "<<j-d<<" days."<<endl;
>   k++;
>   cin>>p>>e>>i>>d;
>   }
>   //system("PAUSE");	
>   return 0;
> }