#include <iostream>
#include <fstream>
using namespace std;
ofstream fout("elmaj.out");

unsigned const maxb = 8192;
unsigned ptr = maxb - 1;
char buf[maxb];

int getInt(ifstream &fin)
{
    int rez = 0;
    while(!(buf[ptr] >= '0' && buf[ptr] <= '9'))
    {
        if(++ptr >= maxb)
        {
            ptr = 0;
            fin.read(buf, maxb);
        }
    }
    while((buf[ptr] >= '0' && buf[ptr] <= '9'))
    {
        rez = rez * 10 + buf[ptr] - '0';
        if(++ptr >= maxb)
        {
            ptr = 0;
            fin.read(buf, maxb);
        }
    }
    return rez;
}

int main()
{
    int n, x, y, i, a;
    ifstream fin("elmaj.in");
    n = getInt(fin);
    x = 0;
    y = 0;
    for(i = 1 ; i <= n ; i++)
    {
        a = getInt(fin);
        if(y == 0)
        {
            x = a;
            y = 1;
        }
        else if(x != a)
        {
            y--;
        }
        else
            y++;
    }
    ifstream fin2("elmaj.in");
    n = getInt(fin2);
    y = 0;
    for(i = 1 ; i <= n ; i++)
    {
        a = getInt(fin2);
        if(a == x)
            y++;
    }
    if(y >= n / 2 + 1)
    {
        fout << x << " " << y << "\n";
    }
    else
        fout << "-1\n";
}