using System;

public class GFG

{

public static string Reverse(string Input) 

{ 

    char[] charArray = Input.ToCharArray(); 

​

    string reversedString = String.Empty; 

    for(int i = charArray.Length - 1; i > -1; i--) 

    { 

        reversedString += charArray[i]; 

    }

​

    return reversedString;

} 

public static void Main(string[] args) 

{ 

    Console.WriteLine(Reverse("Apple"));

    Console.ReadLine();

} 

}