#include<iostream>
using namespace std;

int main()
{
	int p,e,i,d;
	int num;
	int j;
	
	cin>>p>>e>>i>>d;
	num=1;
	while(p!=-1)
	{
		for(j=d+1;j<d+21260;j++)
		{
			if(((j-p)%23==0) && ((j-e)%28==0) && ((j-i)%33==0))
				break;
		}
		cout<<"Case "<<num<<": the next triple peak occurs in "<<j-d<<" days."<<endl;
		cin>>p>>e>>i>>d;
		num++;
	}
	return 0;

}