#include <iostream>
#include<cstdio>
using namespace std;
int n,i,v,m,c;
int main()
{
    freopen("elmaj.in","r",stdin);
    freopen("elmaj.out","w",stdout);
    scanf("%d",&n);
    for(i=1;i<=n;i++)
    {
        scanf("%d",&v);
        if(!c){m=v;c++;continue;}
        c=v==c?c+1:c-1;
    }
    freopen("elmaj.in","r",stdin);
    scanf("%d",&n);
    c=0;
    for(i=1;i<=n;i++)
    {
        scanf("%d",&v);
        c+=v==m;
    }
    if(c<=n/2)printf("-1\n");
    else printf("%d %d",m,c);
    return 0;
}