#include<iostream>
using namespace std;
int main()
{
	int p,e,i,d,num=0;
	while(cin>>p>>e>>i>>d && p!=-1 &&e!=-1 &&i!=-1 &&d!=-1)
	{
		num++;
		while((p-e)%28!=0 || (p-i)%33!=0)
			p+=23;
		while(p-d<=0)
			p+=21252;
		while(p-d>21252)
			p-=21252;
		cout<<"Case "<<num<<": the next triple peak occurs in "<<p-d<<" days."<<endl;
	}
	return 0;

}