using System;

using System.Collections;

​

public class Program

{

    public void secondmost(string[] arr)

    {

        Hashtable ht = new Hashtable();

        int max = 0;

        for (int i = 0; i < arr.Length; i++)

        {

            if (ht.ContainsKey(arr[i]))

            {

                ht[arr[i]] = Convert.ToInt32(ht[arr[i]]) + 1;

                if (Convert.ToInt32(ht[arr[i]]) > max)

                {

                    max = Convert.ToInt32(ht[arr[i]]);

                }

            }

            else

            {

                ht.Add(arr[i], 1);

            }

        }

​

        int second = 0;

        foreach (var iems in ht.Keys)

        {

            if (Convert.ToInt32(ht[iems]) > second)

            {

                if (Convert.ToInt32(ht[iems]) < max)

                {

                    second = Convert.ToInt32(ht[iems]);

                }

            }

        }

​

        foreach (var iems in ht.Keys)

        {

            if (Convert.ToInt32(ht[iems]) == second)

            {

                Console.WriteLine(iems);

            }

        }

    }

​

    public static void Main()

    {

        string[] arr = new string[]{"geek", "for", "geek", "for", "geek","aaa","aaa"};

        Program p = new Program();

        p.secondmost(arr);

    }

}