package com.company.ExamM;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.Scanner;


public class RealShit2 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        String key=sc.nextLine();
        String text=sc.nextLine();

        int index=text.indexOf(key);

        while(index!=-1){
            text=text.replace(key,"");
            index=text.indexOf(key);
        }
        System.out.print(text);


    }
}