#include <iostream>
using namespace std;
int main()
{
	int a, b, c, d, i, t = 1;
	while(cin >> a >> b >> c >> d)
	{
		if(a == -1) break;
		a %= 23; b %= 28; c %= 33;
		for( i = d + 1; i <= 21252; i++)
			if((i - a) % 23 == 0 && (i - b) %28 ==0 && (i - c) %33 ==0)
				break;
		cout << "Case " << t++<<": the next triple peak occurs in "<<i - d<<" days."<<endl;

	}
	return 0;
}