#include <iostream>
#include <vector>
using namespace std;
//最大公約数
int gcd(int a, int b)
{
    return b == 0 ? a : gcd(b, a % b);
}

int main(int argc, char* argv[])
{
	int i,n1,n2;
	cin>>n1;
	int A,B;
	int A1;
	int sign1=0,sign2=0;
	cin>>A1;
	if (A1<0){
		sign1++;
		A1=-A1;
	}
	int A2=1;
	for (i=2;i<=n1;i++){
		cin>>A;
		if (A<0){
			sign1++;
			A=-A;
		}
		A2*=A;
	}
	cin>>n2;
	int B1;
	cin>>B1;
	if (B1<0){
		sign2++;
		B1=-B1;
	}
	int B2=1;
	for (i=2;i<=n2;i++){
		cin>>B;
		if (B<0){
			sign2++;
			B=-B;
		}
		B2*=B;
	}
	int A3=A1*B2;
	int B3=A2*B1;
	int C=gcd(A3,B3);
	if (sign1%2==1&&sign2%2==0){
		A3=-A3;
	}
	if (sign1%2==0&&sign2%2==1){
		B3=-B3;
	}
	cout<<A3/C<<" "<<B3/C<<endl;
	return 0;
}