import java.util.Scanner;


public class prog{

    // primes lower than n

    public static void main(String args[]) {


        Scanner scanner = new Scanner(System.in);
       
       for(;;) {
           if (scanner.hasNextLine()){
            String s = scanner.nextLine();
            String ss[] = s.split(" ");
            String n = ss[0];
            String c1 = ss[1];
            String c2 = ss[2];
            System.out.println( n.replaceAll(c1,c2) );
           }
           else 
               break;
       }


    }


}