#include <bits/stdc++.h>
using namespace std;
int main() {
  map<int, int> m;
  string s;
  int n, a;
  cin >> n >> s;
  for (int i = 1; i < 10; ++i) {
    cin >> a;
    m[i] = a;
  }
  for (int i = 0; i < n; ++i) {
    if (s[i] - '0' < m[s[i] - '0']) {
      while (s[i] - '0' <= m[s[i] - '0']) {
        s[i] = '0' + m[s[i] - '0'];
        ++i;
      }
      break;
    }
  }
  cout << s;
  return 0;
}
