#include <bits/stdc++.h>
using namespace std;


int n;
int t;
string str;

vector <string> a;

vector <int> nxt;

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    cin >> n;

    a.resize(n);
    nxt.resize(n);

    for(int i=0;i<n;i++)
    {
        cin >> a[i];
        reverse(a[i].begin(),a[i].end());
        nxt[i]=i+1;
    }

    cin >> str;
    reverse(str.begin(),str.end());

    string ans;



    while(true){
    bool flag=false;
    for(int i=0;i<n;)
    {
        while(a[i].size() && a[i].back()!=str.back())
        {
            ans+=a[i].back();
            a[i].pop_back();
        }

        if(a[i].size())
        {
            flag=true;
        }

        while(nxt[i]<n && a[nxt[i]].size()==0)
        {
            nxt[i]=nxt[nxt[i]];
        }

        i=nxt[i];
    }

    if(flag)
    {
        ans+=str.back();

        for(int i=0;i<n;)
        {
            if(a[i].size() && a[i].back()==str.back())
            {
                a[i].pop_back();
            }
        
            while(nxt[i]<n && a[nxt[i]].size()==0)
            {
                nxt[i]=nxt[nxt[i]];
            }

            i=nxt[i];
        }

        str.pop_back();

        if(str.size() == 0)
        {
            cout << "NO\n";
            return 0;
        }
    }

    else break;
    }

    cout << "YES\n" << ans;
}