#include <iostream> 
using namespace std;

void main(){ 
    int p, e, i, d;
	int j,days=-1;
	for(j=1;;j++){
		cin >> p >> e >> i >> d;
		if(p==-1 && e ==-1 && i==-1 && d == -1) break;
		for(int x = 21252; x > d ;x--)
		{
			if( (x-p)%23 == 0 && (x-e)%28 ==0 && (x-i)%33 == 0 )
			{days = x-d;break;}
		}
		printf("\nCase %d: the next triple peak occurs in %d days.", j, days);
	}
}