#include <bits/stdc++.h>

using namespace std;
using ll = int64_t;

int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);

	int n;
	cin >> n;

	vector<string> ss(n);
	vector<int> ind(n);
	string t;
	set<int> ndone;

	for(int i = 0; i < n; ++i) {
		cin >> ss[i];
		ndone.insert(i);
	}

	cin >> t;
	
	int ti = 0;
	string res;
	while(true) {
		if(ti == t.size()) {
			cout << "NO\n";
			return 0;
		}
		if(ndone.empty()) break;
		char c = t[ti];
		vector<int> del;
		for(int i : ndone) {
			while(ind[i] < ss[i].size() && ss[i][ind[i]] != c) {
				res += ss[i][ind[i]];
				++ind[i];
			}
			if(ind[i] == ss[i].size()) del.push_back(i);
		}
		for(int d : del) {
			ndone.erase(d);
		}
		del.clear();
		if(ndone.empty()) break;
		++ti;
		res += c;
		for(int i = 0; i < n; ++i) {
			if(ind[i] < ss[i].size() && ss[i][ind[i]] == c) {
				++ind[i];
			}
			if(ind[i] == ss[i].size()) del.push_back(i);
		}
		for(int d : del) {
			ndone.erase(d);
		}
	}

	cout << "YES\n";
	cout << res << '\n';
	
	return 0;
}