#include <iostream>
using namespace std;
int main()
{
	long p=0,e=0,i=0,d=0,colomn=0;
	int sum[1000]={0};
	while(cin>>p>>e>>i>>d)
	{
		if (p==-1&&e==-1&&i==-1&&d==-1)
		{
			continue;
		}
		for (int j=-1;(j<28*23)&&(i+33*j)<21252;j++)
		{
			long k = i+33*j;
			if (((k-e)%28==0)&&((k-p)%23==0))
			{
				if ((k-d)<=0)
				{
					sum[colomn]=k-d+21252;
				}else
				{
					sum[colomn]=k-d;
				}
				if (sum[colomn]>21252)
				{
					sum[colomn]-=21252;
				}
			}
		}
		colomn++;
	}
	for(int j=0;j<colomn;j++)
	{
		cout<<"Case "<<j+1<<": the next triple peak occurs in "<<sum[j]<<" days."<<endl;
	}
	return 0;
}