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

public class Solution {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        FileInputStream fileInputStream = new FileInputStream(reader.readLine());
        String sNumbers = reader.readLine();
        Integer numbers = Integer.parseInt(sNumbers);

        reader.close();

        ArrayList<Integer> list = new ArrayList<>();

        while (fileInputStream.available() > 0) {
            if (numbers % 2 == 0) {
                list.add(numbers);
            }

            Collections.sort(list);

            for (int i = 0; i < list.size(); i++) {
                System.out.println(list.get(i));
            }
        }

    }
}