#include <bits/stdc++.h>
using namespace std;
void solver() {
  map<char, int> m1;
  map<int, char> m2;
  string s1, s2, s3, ans;
  cin >> s1;
  cin >> s2;
  cin >> s3;
  for (int i = 0; i < s1.length(); i++) {
    m1[s1[i]] = i;
  }
  for (int i = 0; i < s2.length(); i++) {
    m2[i] = s2[i];
  }
  for (int i = 0; i < s3.length(); i++) {
    if (isupper(s3[i])) {
      char ch;
      int pos;
      ch = tolower(s3[i]);
      pos = m1[ch];
      char ch2 = m2[pos];
      ans += toupper(ch2);
    } else if (isdigit(s3[i])) {
      ans += s3[i];
    } else {
      int pos;
      pos = m1[s3[i]];
      ans += m2[pos];
    }
  }
  cout << ans;
}
int main(int argc, char const *argv[]) {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  int t = 1;
  while (t--) {
    solver();
  }
  return 0;
}
