package com.javarush.task.task13.task1326;
/*
Сортировка четных чисел из файла
*/
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Iterator;
import java.util.Set;
import java.util.TreeSet;
public class Solution {
public static void main(String[] args) throws IOException {
FileInputStream file = new FileInputStream(new BufferedReader(new InputStreamReader(System.in)).readLine());
Set<Integer> set = new TreeSet<>();
BufferedReader reader = new BufferedReader(new InputStreamReader(file));
while (reader.ready()) {
int num = Integer.parseInt(reader.readLine());
if (num % 2 == 0) set.add(num);
}
file.close();
Iterator it = set.iterator();
while (it.hasNext()) {
System.out.println(it.next());
}
}
}