Hello! Code below works fine, but task verify is failed. Why is that? :) 
package pl.codegym.task.task07.task0720;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;

/*
Przestawiono w samą porę
*/

public class Solution {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

        int N = Integer.parseInt(reader.readLine());
        int M = Integer.parseInt(reader.readLine());


        ArrayList<String> lista = new ArrayList<>();

        for (int i = 0; i < N; i++)
        {
            String slowaDoListy = reader.readLine();
            lista.add(slowaDoListy);
        }

        for (int i = 0; i < M; i++)
        {
            lista.add(lista.get(i));
        }

        for (int i = 0; i < M; i++)
        {
        lista.remove(lista.get(i));
        }

        for (String s : lista)
        {
            System.out.println(s);
        }



    }
}