import java.io.BufferedReader;
import java.io.InputStreamReader;

public class prog {

  public boolean check(String string) {
    char[] one = string.split(" ")[0].toCharArray();
    char[] two = string.split(" ")[1].toCharArray();
    char[] three = string.split(" ")[2].toCharArray();
    if (one.length == 1 && one[0] == '0' && two.length == 1 && two[0] == '0' && three.length == 1 && three[0] == '0') {
      return false;
    }
    for (int i = 0; i < one.length; i++) {
      if (one[i] == two[0]) {
        one[i] = three[0];
      }
    }
    String fin = "";
    for (int i=0;i<one.length;i++)
      fin = fin + one[i];
    System.out.println(Integer.parseInt(fin));
    return true;
  }


  public static void main(String[] args) {
    prog myMain = new prog();
    BufferedReader buffer = new BufferedReader(new InputStreamReader(System.in));
    String n;
    boolean ok = true;
    do {
      try {
        n = buffer.readLine();
        ok = myMain.check(n);
      }
      catch (Exception e) {
        e.printStackTrace();
      }

    } while (ok);
  }
}