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