#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define AC "test"
#define foru(i, l, r) for (int i = (l); i <= (r); i++)
#define ford(i, l, r) for (int i = (l); i >= (r); i--)
#define fi first
#define se second
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vii;
typedef vector<ll> vll;
const ll inf = 1e9 + 7;
const ll linf = 1e18 + 7;
const int mod = 1e9 + 7;
const int maxn = 5e2 + 7;
const int base = 31;
void fastIO(){
ios_base::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
}
ll mul(ll a, ll b){
a%=mod;
ll res = 0;
while (b){
if (b%2) res = (res + a)%mod;
a = (a + a)%mod;
b/=2;
}
return res;
}
ll Pow(ll a, ll b){
ll ans = 1;
while (b){
if (b % 2) ans = mul(ans, a);
a = mul(a, a);
b/=2;
}
return ans;
}
string s, t[maxn];
ll n, m, k, x, tmp, res[maxn], val;
void inp(){
cin >> n >> m >> k >> x;
cin >> s;
memset(res, 1, sizeof(res));
foru(i, 1, m){
cin >> t[i];
sort(t[i].begin(), t[i].end());
}
tmp = 0;
val = k;
foru(i, 1, m){
if (val < x){
val = val * k;
tmp++;
}
}
val/=k;
foru(i, 1, tmp + 1){
res[i] = ceil((float)x/val);
x = x%val;
val/=k;
if (x == 0){
foru(j, i + 1, m){
res[j] = k;
}
break;
}
}
int cnt = 1;
for (char c: s){
if (c == '#'){
cout << (t[cnt][res[cnt] - 1]);
cnt++;
}
else cout << c;
}
}
int main(){
fastIO();
if (fopen(AC".inp", "r")){
freopen(AC".inp", "r", stdin);
freopen(AC".out", "w", stdout);
}
inp();
}
