#include <bits/stdc++.h>
using namespace std;
#define fwd(i, a, n) for(int i = (a); i < (n); i++)
#define rep(i, n) fwd(i, 0, n)
#define all(X) X.begin(), X.end()
#define sz(X) int(size(X))
#define pb push_back
#define eb emplace_back
#define st first
#define nd second
using pii = pair<int, int>; using vi = vector<int>;
using ll = long long; using ld = long double;
#ifdef LOC
auto SS = signal(6, [](int) {* (int *) 0 = 0;});
#define DTP(x, y) auto operator << (auto& o, auto a) -> decltype(y, o) {o << "("; x; return o << ")";}
DTP(o << a.st << ", " << a.nd, a.nd);
DTP(for(auto i : a) o << i << ", ", all(a));
void dump(auto... x) {((cerr << x << ", "), ...) << "\n";}
#define deb(x...) cerr << setw(4) << __LINE__ << ":[" #x "]: ", dump(x)
#else
#define deb(...) 0
#endif

int32_t main(){
    cin.tie(0)->sync_with_stdio(0);
    cout << fixed << setprecision(10);

    int n = 0;
    cin >> n;
    vector<string> words(n);
    rep(i, n) cin >> words[i];
    string banned, ans;
    cin >> banned;
    vi ids(n);

    vector<vi> nxt(26);
    rep(i, n) nxt[words[i][0] - 'a'].pb(i);
    int finished = 0;

    rep(idban, sz(banned)) {
        int k = 1;
        while (k) {
            k = 0;
            rep(letter, sz(nxt)) {
                if (letter != banned[idban]-'a' && sz(nxt[letter])) {
                    int i = nxt[letter].back();
                    nxt[letter].pop_back();
                    ans.pb(letter + 'a');
                    ++ids[i];
                    k = 1;
                    if (ids[i] < sz(words[i])) {
                        nxt[words[i][ids[i]] - 'a'].pb(i);
                    }
                    else {
                        ++finished;
                    }
                }
            }
            deb(k, idban, ans, ids, nxt);
        }
        deb(idban, ans, ids, nxt);

            if (finished == n) {
                cout << "YES\n" << ans << '\n';
                return 0;
            }
            if (idban == sz(banned) - 1) {
                cout << "NO\n";
                return 0;
            }
            vi kto = nxt[banned[idban]-'a'];
            nxt[banned[idban]-'a'].clear();
            ans.pb(banned[idban]);

            for (int i : kto) {
                ++ids[i];
                if (ids[i] < sz(words[i])) {
                    nxt[words[i][ids[i]] - 'a'].pb(i);
                }
                else {
                    ++finished;
                }
            }
        deb(idban, ans, ids, nxt);
    }

    return 0;
}