using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

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

        Console.WriteLine("Please input integers: (in one line)");

        string input = Console.ReadLine();

        string[] tokens = input.Split();   // split string into tokens "12 13 10" -> "12" "13" "10"

        foreach (string s in tokens) {

            int num;

            bool success = int.TryParse(s,out num);  // TryParse returns true if successfully converted s into an int 

                                                     // the converted int is put into the second parameter using keyword "out"  

                                                     // do you know why "out" is used here? why not return the converted integer?

            if (success) {

                list.Add(num);    // add num to list if success

            } 

        }

        int len=tokens.Length;

        list.RemoveAt(len-1);

        list.RemoveAt(len-2);

        Console.WriteLine(string.Join(", ", list));

    }

}