#include <iostream>
#include <cassert>
#define int long long
#define rep(i, n) for(i = 0; i < n; i++)
using namespace std;

int gcd(int a, int b) {
	if (b == 0) return a;
	return gcd(b, a % b);
}

int n;
int a[10];
int m;
int b[10];

signed main() {
	int i;
	bool flag = false;
	
	cin >> n;
	assert(1 <= n && n <= 10);
	rep(i, n) {
		cin >> a[i];
		assert(-10 <= a[i] && a[i] <= 10);
		if (a[i] < 0) {
			flag = !flag;
			a[i] = -a[i];
		}
	}
	
	cin >> m;
	assert(1 <= m && m <= 10);
	rep(i, m) {
		cin >> b[i];
		assert(-10 <= b[i] && b[i] <= 10);
		if (b[i] < 0) {
			flag = !flag;
			b[i] = -b[i];
		}
	}
	
	int si = a[0];
	rep(i, m) { if (i > 0) si *= b[i]; }
	
	int bo = b[0];
	rep(i, n) { if (i > 0) bo *= a[i]; }
	
	int g = gcd(si, bo);
	si /= g;
	bo /= g;
	
	if (flag) {
		cout << -si << " " << bo << endl;
	}
	else {
		cout << si << " " << bo << endl;
	}
	return 0;
}