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