#include <bits/stdc++.h>
using namespace std;
template <class T1>
void deb(T1 e1) {
  cout << e1 << endl;
}
template <class T1, class T2>
void deb(T1 e1, T2 e2) {
  cout << e1 << " " << e2 << endl;
}
template <class T1, class T2, class T3>
void deb(T1 e1, T2 e2, T3 e3) {
  cout << e1 << " " << e2 << " " << e3 << endl;
}
template <class T1, class T2, class T3, class T4>
void deb(T1 e1, T2 e2, T3 e3, T4 e4) {
  cout << e1 << " " << e2 << " " << e3 << " " << e4 << endl;
}
template <class T1, class T2, class T3, class T4, class T5>
void deb(T1 e1, T2 e2, T3 e3, T4 e4, T5 e5) {
  cout << e1 << " " << e2 << " " << e3 << " " << e4 << " " << e5 << endl;
}
template <class T1, class T2, class T3, class T4, class T5, class T6>
void deb(T1 e1, T2 e2, T3 e3, T4 e4, T5 e5, T6 e6) {
  cout << e1 << " " << e2 << " " << e3 << " " << e4 << " " << e5 << " " << e6
       << endl;
}
int dx[] = {0, 0, 1, -1};
int dy[] = {-1, 1, 0, 0};
string A, B, C, ans;
map<char, char> Mp;
int main() {
  int t, kase = 0, a, b, i, j, k, l, mx;
  while (cin >> A >> B) {
    Mp.clear();
    for (i = 0; i < 26; i++) {
      Mp[A[i]] = B[i];
    }
    cin >> C;
    for (i = 0; i < C.size(); i++) {
      char ch = C[i];
      char add;
      if (ch >= 'a' && ch <= 'z')
        add = Mp[ch];
      else if (ch >= 'A' && ch <= 'Z') {
        ch = ch - 'A' + 'a';
        add = Mp[ch] - 'a' + 'A';
      } else
        add = ch;
      printf("%c", add);
    }
    printf("\n");
  }
  return 0;
}
