#include<iostream>
using namespace std;
int main(){
int p, e, i, d, k;
int ans, no;
while(cin>>p>>e>>i>>d)
{
++ no;
if(p==-1 && e==-1 && i==-1 && d==-1)
break;
for(k = d + 1; (k - p) % 23; k ++){
for(; (k - e) % 28; k += 23){
for(; (k - i) % 33; k += 23 * 28){
cout<<"Case "<<no<<": the next triple peak occurs in "<<k - d<<" days."<<endl;
}
}
}
}
return 0;
}