import java.util.Scanner;
//Parse String

public class Program01 {
    public static void main(String[] args) {
        Scanner scanner =  new Scanner("1, 2, 3, 4, 5, 6, 7, 8, 9, 10").useDelimiter(", ");

        while (scanner.hasNextInt()) {
            int num = scanner.nextInt();

            if (num % 2 == 0)
                System.out.println(num);
        }
    }
}