#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <iostream>
#include <cctype>
#include <ctime>
#include <string.h>
#include <algorithm>
using namespace std;
long long n, m, k, x, nm, a, l;
string s, sc;
char c[503][29];
int main(){
cin >> n >> m >> k >> x;
cin >> s;
for (int i = 0; i < m; i++){
cin >> sc;
strcpy(c[i], sc.c_str());
sort(c[i], c[i] + k);
}
a = x;
l = s.length();
for (int i = 0; i < l; i++){
if (s[i] == '#'){
s[i] = c[nm][(a % (k + 1)) - 1];
a = a / (k+1);
nm = nm + 1;
}
}
cout << s;
return 0;
}
