#include <iostream.h>
void main()
{
	static int a[100],b[100],c[100],d[100],e[100];
	int i=0;

	while (a[i]!=-1)
	{
			 int t=1;
		i++;
		cin>>a[i]>>b[i]>>c[i]>>d[i];
	  
	   while (t<=644)
	   {
		   if ((c[i]+33*t-a[i])%23==0&&(c[i]+33*t-b[i])%28==0)
			   break;
		   else t++;
	   }
	  
	   e[i]=c[i]+33*t-d[i];
	  
	}
	for (int j=1;j<i;j++)
		cout<<"Case "<<j<<": the next triple peak occurs in "<<e[j]<<" days."<<endl;
}