package com.scalefocus;

import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Scanner;

public class Main {

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

	    String[] words = sc.nextLine().split(" ");

	    //another way of converting array to stream:
        //Arrays.asList(words).stream()
	    String[] resultWord = Arrays
                .stream(words)
                .filter(word -> word.length() % 2 == 0)
                .toArray(String[]::new);

        for (String word : resultWord) {
            System.out.println(word);
        }
    }
}