#include<iostream>
using namespace std;

int main()
{
   int p,e,i,d,t,x,find,ans,count=0;
   while(1)
   {
      cin>>p>>e>>i>>d;
      if(p==-1)
      break;
      count++;
      find=0;
      for (x=1;!find;x++)
      if ((p+23*x-e)%28==0&&(p+23*x-i)%33==0)
      {find=1;ans=p+23*x-d;break;}
      if (ans>21252)
      ans%=21252;
      while(ans<=0)
      ans+=21252;
      cout<<"Case "<<count<<": the next triple peak occurs in "<<ans<<" days."<<endl;
   }
   return 0;
}