> #include<stdio.h>
> int main()
> {
>     int p,e,i,d,k=1,a;
>     while(scanf("%d%d%d%d",&p,&e,&i,&d)!=EOF)
>     {
>         if(p==-1&&e==-1&&i==-1&&d==-1)break;
>         a=((5544*p+14421*e+1288*i)-d)%21252;
>         if(a<=0)a+=21252;
>         printf("Case %d: the next triple peak occurs in %d days.\n",k++,a);
>     }
>     return 0;
> }