using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        List<int> list=new List<int>();

        string[]b=Console.ReadLine().Split();

        foreach(var a in b)

        {

            if(int.Parse(a)>0) list.Add(int.Parse(a));

        }

        foreach(var a in list)

        {

            Console.WriteLine(a);

        }

    }

}