#include<math.h>
main()
{int p,e,i,d,j=0;
 do
 {scanf("%d",&p);
  scanf("%d",&e);
  scanf("%d",&i);
  scanf("%d",&d);
  if(p!=-1&&e!=-1&&i!=-1&&d!=-1)
   {j++;
    p=p+23;
    e=e+28;
    while(e<p||(e-p)%23!=0)
     {e=e+28;
      }

    i=i+33;
    while(i<e||(i-e)%28!=0||(i-p)%23!=0)
     {i=i+33;
     }
    printf("Case %d: the next triple peak occurs in %d days.\n",j,i-d);
   }
 }while(p!=-1&&e!=-1&&i!=-1&&d!=-1);

getch();
}