using System;

public class Program

{

    public static void Main()

    {

        Console.Write("Your first input: ");

        char[] array = Console.ReadLine().ToCharArray();

        string text = "";

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

        {

            if (i % 2 == 0 && i + 2 <= array.Length)

            {

                text += array[i + 1];

            }

        }

Console.WriteLine("the calculated string is:");

Console.WriteLine(text);

    }

}