#include <bits/stdc++.h>

using namespace std;
using ll = long long;
using ld = long double;

const ld pi = 3.14159265358979;
const int mod = 1000000007;

int func(vector<int> a , vector<int> b){
	int ans = 1;
	int now = b[0];
	b.erase(b.begin());
	for(;;){
		while(now <= a[0]){
			a.erase(a.begin());
			if(a.size() == 0)return ans;
		}
		ans++;
		now = a[0];
	 if(b.size() == 0)return ans;
		while(now <= b[0]){
			b.erase(b.begin());
			if(b.size() == 0)return ans;
		}
		ans++;
		now = b[0];
	}
	return ans;
}

int main(){
	int n;
	cin >> n;
	vector<int> a(n);
	for(int i = 0; i < n; i++){
		cin >> a[i];
	}

	int m;
	cin >> m;
	vector<int> b(m);
	for(int i = 0; i < m; i++){
		cin >> b[i];
	}
	sort(a.rbegin() , a.rend());
 sort(b.rbegin() , b.rend());
	cout << max(func(a , b) , func(b , a)) << endl;
	return 0;
}