#include <iostream>
#include <fstream>

using namespace std;

ifstream f ("elmaj.in");
ifstream f2 ("elmaj.in");
ofstream g ("elmaj.out");

int n;

void rezolva() {
    int cand = -1, k = 0, x;
    for (int i = 1; i <= n; i++) {
        f >> x;
        if (k == 0) cand = x, k++;
        else if (x == cand) k++;
        else k--;
    }
    f.close(); f2 >> n;
    int aparitii = 0;
    for (int i = 1; i <= n; i++) {
        f2 >> x;
        //cout << x << ' ';
        if (x == cand) aparitii++;
    }
    if (aparitii >= (n + 1) / 2) g << cand << ' ' << aparitii;
    else g << -1;
    g << '\n';
}

int main() {
    f >> n;
    rezolva();
    return 0;
}