//

// Level - Junior; 

//

// 1] Any problems or suggestions?

// 2] 

//

// Expected output: 11 13 15 17 19

// 

// 

using System;

using System.Collections.Generic;

using System.Linq;

​

public class Program

{

    public static readonly List<int> a = new List<int>() { 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 }; // Enumerable.Range(10, 10)

    public static void Main()

    {

        NumberFormatter nf = new NumberFormatter(); // name fields properly!

        List<int> r = nf.GetOddNumbers(a).ToList();

        foreach(var i in r)

            Console.WriteLine("\n" + i);

    }

    public class NumberFormatter

    {

      public NumberFormatter()

      {

      }

​

      public IEnumerable<int> GetOddNumbers(List<int> input) 

      { 

        var rez = new List<int>(); //

        foreach(var i in input)

        {

            if(i % 2 != 0)

                rez.Add(i); //

            //yield return i;

        }

        return rez;

      }     

   }    

}