POJ1006

#include<iostream>
using namespace std;

int main()
{
	int p,e,i,d,num = 1;
	cin>>p>>e>>i>>d;
	while((p!=-1) || (e!=-1) || (i!=-1) || (d!=-1)){
		while((p!=e) || (p!=i)){
			if(p<e){
				if(p<i){
					p+=23;
				}else i+=33;
			}
			else{
				if(e<i) e+=28;
				else i+=33;
			}
		
		}
		int days = (21252+p-d)%21252;
		if(days == 0) days = 21252;
		cout<<"Case " << num <<": the next triple peak occurs in " << days << " days."<<endl;
		num++;
		cin>>p>>e>>i>>d;
	}
	return 0;
}