using System;
using System.Collections;
using System.Collections.Generic;
public class Program
{
public static void Main()
var a = new List<int> {1, 3, 10, 10, 9, 1, 19};
RemoveOdd(a);
Console.WriteLine(string.Join(",", a));
}
public static void RemoveOdd(IList<int> x) {
// your code goes here