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

}