#include <bits/stdc++.h>
using namespace std;
void fast() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
}
int main() {
  fast();
  long long n;
  cin >> n;
  char a[n + 10];
  for (int i = 1; i <= n; ++i) cin >> a[i];
  long long func[15];
  for (int i = 1; i <= 9; ++i) {
    cin >> func[i];
  }
  for (int i = 1; i <= n; ++i) {
    if (func[a[i] - '0'] > a[i] - '0') {
      for (int j = i; j <= n; ++j) {
        if (a[j] - '0' <= func[a[j] - '0'])
          a[j] = func[a[j] - '0'] + '0';
        else
          break;
      }
      for (int j = 1; j <= n; ++j) cout << a[j];
      return 0;
    }
  }
  for (int i = 1; i <= n; ++i) cout << a[i];
  return 0;
}
