using System;public class Program{public static void Main(){

        Console.WriteLine(); string gyma = Console.ReadLine();

        Console.WriteLine("                      въведен string : = " + gyma);

        int N = gyma.Length; Console.WriteLine("брой символи = {0}", N);

        char[] ob = gyma.ToCharArray();

        Array.Reverse(ob);

            Console.Write("                      ОБРАТНО string : = ");

        Console.WriteLine(ob);

        var txt = gyma.ToCharArray();

        int j = N;

        for (int i = 0; i < N; i++)

        {

            j = j - 1;

            Console.WriteLine("  " + i + ":" + txt[i] + " <=> " + j + ":" + txt[j]);

}  }  }