#include <bits/stdc++.h>
using namespace std;
int main() {
  string arr;
  string arr2;
  string arr3;
  cin >> arr >> arr2 >> arr3;
  int temp;
  char c;
  int length = 0;
  temp = arr3[0];
  while (arr3[length] != '\0') {
    length++;
  }
  for (int i = 0; i < length; i++) {
    temp = arr3[i];
    c = arr3[i];
    if (temp >= 48 && temp <= 57)
      cout << temp - 48;
    else if (temp >= 97 && temp <= 122) {
      int i = 0;
      while (c != arr[i] && i < 26) i++;
      cout << arr2[i];
    } else {
      int i = 0;
      c = temp + 32;
      while (c != arr[i] && i < 26) i++;
      temp = arr2[i] - 32;
      c = temp;
      cout << c;
    }
  }
  return 0;
}
