/*Result:AC*/
#include<stdio.h>
typedef int NUM;

#define F (924*(-((56*i+241*p-297*e)/924))+(56*i+241*p-297*e))

int main()
{
	NUM p,e,i,d;
	NUM count=1;
	NUM D;
	scanf("%d %d %d %d",&p,&e,&i,&d);
	do
	{
		D=F*23+p-d;
		D%=21252;
		D+=21251;
		D%=21252;
		D++;
		printf("Case %d: the next triple peak occurs in %d days.\n",count++,D);
		scanf("%d %d %d %d",&p,&e,&i,&d);
	}
	while(p>=0);
	return 0;
}

/*这个还用了84KB!20KB的能不能贴出来看看？*/