using System;

​

public class Program

{

    public static void Main()

    {

        string ninput, kinput;

        int number, k = 0;

        Console.Write("Please enter positive number with 7 digits:");

        while ((ninput = Console.ReadLine()) != null)

        {

            number = int.Parse(ninput);

            if (number < 0)

            {

                Console.WriteLine("Please enter positive number!");

            }

            else if (number < 999999 || number > 10000000)

            {

                Console.WriteLine("Please enter number between 999999 and 10000000");

            }

            else

            {

                break;

            }

        }

​

        Console.Write("Please enter positive number between 1 and 7:");

        while ((kinput = Console.ReadLine()) != null)

        {

            k = int.Parse(kinput);

            if (k < 1 || k > 7)

            {

                Console.WriteLine("K must be between 1 and 7");

            }

            else

            {

                break;

            }

        }

​

        char[] chars = ninput.ToCharArray();

        // First get k-th digid from left to right

        Console.WriteLine(k + "-th digit from left to right is: " + chars[k - 1]);

        // Then get k-th digid from right to left

        Console.WriteLine(k + "-th digit from left to right is: " + chars[7 - k]);

    }

}