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