using System;

public class Program

{

    public static void Main()

    {

        int [] numbers ={1,4,7,1,23,6,23};

        int n=numbers.Length;

        if(n<2)

        {

            return;

        }

        Array.Sort(numbers);

        for(int i=n-2;i>=0;i--)

        {

            if(numbers[i] !=numbers[n-1])

            {

                Console.WriteLine("Second Highest number is : "+numbers[i]);

                return;

            }

        //Console.WriteLine("Hello World");

    }

    }

}