using System;

using System.Collections.Generic;

​

public class Program

{   

    public static List<Char> txt = new List<Char>();

​

    public static void Main()

    {

        string str = "anotaram a data da maratona";

        str = str.Replace(" ", "");

        txt.AddRange(str.ToCharArray(0,str.Length));

        txt.Reverse();

        for(int i = 0; i < txt.Count; i++)

        {

            Console.WriteLine(txt[i]);

        }

    }

}