#include <bits/stdc++.h>

using namespace std;

#define INF 100000000
#define YJ 1145141919
#define INF_INT_MAX 2147483647
#define INF_LL 9223372036854775
#define INF_LL_MAX 9223372036854775807
#define EPS 1e-10
#define MOD 1000000007
#define Pi acos(-1)
#define LL long long
#define ULL unsigned long long
#define LD long double

#define int long long

#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n) FOR(i,0,n)
#define ALL(a)  begin((a)), end((a))
#define RALL(a) (a).rbegin(), (a).rend()
#define PB push_back
#define MP make_pair
#define SZ(a) int((a).size())

const int MAX_N = 10;

int N,M;
int A[MAX_N];
int B[MAX_N];

signed main()
{
  cin >> N;
  int k = 0;
  REP(i,N) {
    cin >> A[i];
    if(A[i] < 0) {
      k++; A[i] *= -1;
    }
  }
  cin >> M;
  REP(i,M) {
    cin >> B[i];
    if(B[i] < 0) {
      k++; B[i] *= -1;
    }
  }

  int a = A[0], b = B[0];
  FOR(i,1,min(N,M)) {
    a *= B[i];
    b *= A[i];
    int tmp = __gcd(a, b);
    a /= tmp;
    b /= tmp;
  }

  if(N < M) {
    FOR(i,N,M) {
      a *= B[i];
    }
  } else {
    FOR(i,M,N) {
      b *= A[i];
    }
  }

  int tmp = __gcd(a,b);
  a /= tmp;
  b /= tmp;

  cout << a*(k%2 == 0 ? 1 : -1) << " " << b << endl;

  return 0;
}