#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 1000000

int get(vector<int> a,vector<int> b){
	sort(a.rbegin(),a.rend());
	sort(b.rbegin(),b.rend());
	int ret = 0;
	int last = -1;
	while(a.size()>0){
		if(a.back()<=last){
			a.pop_back();
			continue;
		}
		last = a.back();
		a.pop_back();
		ret++;
		swap(a,b);
	}
	return ret;
}

int main(){
	int n;
	cin>>n;
	vector<int> a(n);
	rep(i,n)cin>>a[i];
	int m;
	cin>>m;
	vector<int> b(m);
	rep(i,m)cin>>b[i];
	
	cout<<max(get(a,b),get(b,a))<<endl;
	
	return 0;
}