#include <bits/stdc++.h>   using namespace std;   long long n, m, k, x, y, z, a[5005], b[50005], ans, val;   int main() {     ios_base::sync_with_stdio(false), cin.tie(0), cout.tie(0);     cin >> n;     for (long long i = 0; i < n; i++) cin >> a[i];     cin >> m;     for (long long i = 0; i < m; i++) cin >> b[i];     sort(a, a + n);     sort(b, b + m);     cout << a[n - 1] <<     << b[m - 1];     return 0;   }   