#include <bits/stdc++.h>

using namespace std;

void set_max(int& a,int b){
	a = max(a,b);
}

int DP[1001][1001];

bool mozem(char x, string b){
	for(auto y : b){
		if(x == y) return 1;
		if(y == '?') return 1;
	}
	return 0;
}

int main() {
	int n; cin>>n;
	string s; cin>>s;
	int m; cin >>m;
	string pattern; cin >>pattern;

	vector<string> pat;
	vector<int> trans(m,-1);
	vector<int> stak;

	int last = -1;
	bool hran = false;

	for(int i = 0;i < m;i++){
		char p = pattern[i];
		if(p == '('){
			stak.push_back(pat.size());
		}else if(p == ')'){
			last = stak.back();
			stak.pop_back();
		}else if(p == '*'){
			if(pattern[i-1] == ')'){
				trans[pat.size()-1] = last;
			}else {
				trans[pat.size()-1] = pat.size()-1;
			}
		}else if(p == '['){
			pat.push_back({});
			hran = true;
		}else if(p ==']'){
			hran = false;
		}else{
			if(hran){
				pat.back().push_back(p);
			}else{
				pat.push_back({p});
			}
		}
	}
//
//	for(int i =0;i < pat.size();i++){
//		cerr << trans[i] << endl;
//		for(auto j : pat[i]) cerr << j << " "; cerr << endl;
//	}
//
	int N = n, M = pat.size();
	for(int i = 0;i < N+1;i++)for(int j = 0;j < M+1;j++) DP[i][j] = -1;
	DP[0][0] = 0;

	for(int i = 0; i < N;i++)for(int j = 0;j < M;j++){
		if(mozem(s[i], pat[j])){
			if(trans[j] != -1) set_max(DP[i+1][trans[j]], DP[i][j] + 1);
			set_max(DP[i+1][j+1], DP[i][j] + 1);
		}
		set_max(DP[i+1][j], DP[i][j]);
	}
	//for(int i =0;i<N+1;i++){
	//	for(int j = 0;j < M+1;j++){
	//		cerr << DP[i][j] << " ";
	//	}
	//	cerr << endl;
	//}
	cout << DP[N][M] << endl;
}