#include<cstdio>
#include<iostream>
#include<algorithm>
#include<string>
#include<queue>
#include<vector>
#include<functional>
#include<cmath>
#include<map>
#include<stack>
#include<set>
#include<numeric>
#include<limits>

#define all(x) (x).begin(),(x).end()
#define rall(x) (x).rbegin(),(x).rend()

using namespace std;
typedef long long ll;
typedef pair<int, int> pi;
typedef pair<ll, ll> pl;
typedef pair<ll, string> pls;

int check(priority_queue<int> pq1, priority_queue<int> pq2) {
	int size1 = 1, pre = pq1.top(); pq1.pop();
	for (int i = 0; ;) {
		int next;
		if (i % 2 == 0) {
			if (pq2.empty())break;
			next = pq2.top(); pq2.pop();
		}
		else {
			if (pq1.empty())break;
			next = pq1.top(); pq1.pop();
		}
		if (pre > next) {
			size1++;
			pre = next;
			i++;
		}
	}
	return size1;
}

int main()
{
	int Nw, Nb;
	priority_queue<int> pq1, pq2, pq1_tmp, pq2_tmp;

	cin >> Nw;
	for (int i = 0; i < Nw; i++) {
		int w;
		cin >> w;
		pq1.push(w);
		pq1_tmp.push(w);
	}

	cin >> Nb;
	for (int i = 0; i < Nb; i++) {
		int w;
		cin >> w;
		pq2.push(w);
		pq2_tmp.push(w);
	}

	cout << max(check(pq1,pq2),check(pq2_tmp,pq1_tmp)) << endl;
	return 0;
}