> #include <stdio.h>
> #define peak 21252+365
> #include <stdlib.h>
> int main()
> {
>     int p,e,i,d;
>     int count=0;
>     int k;
>     while(scanf("%d%d%d%d",&p,&e,&i,&d)==4&&p!=-1)
>     {    
>         int n=0;
>         count++;
>         p=p%23;
>         e=e%28;
>         i=i%33;
>         for(n=peak;n>=0;n--)
>         {
>          if((n-p)%23==0&&(n-e)%28==0&&(n-i)%33==0)
>           break;
>         } 
>         printf("Case %d: the next triple peak occurs in %d days.\n",count,n-d);
>     }
>    
>     system("pause");
> 
> 
> }           
>