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