#include <stdio.h>
int main()
{ int p,e,i,d,j,y;
    y=1;
while(scanf("%d%d%d%d",&p,&e,&i,&d)!=EOF){
   if(p==-1&&e==-1&&i==-1&&d==-1) break;
	j=d;
	if(j<p)
	 j=p;
	 if(j<e)
	  j=e;
	  if(j<i)
	  j=i;
	  while((j-p)%23!=0)
		  j++;
	  if(j==0)
	  {printf("Case %d: the next triple peak occurs in 21252 days.\n",y);y++;continue;}	
	  for(;j<=21252;j+=23)
		  if((j-e)%28==0)
			  for(;j<=21252;j+=23*28)
				  if((j-i)%33==0)
				  {printf("Case %d: the next triple peak occurs in %d days.\n",y,j-d);y++;}		

}
}