using System;

using System.Linq;

using System.Collections;

public class Reverse

{

    public static void Main()

    {

        var str = "0123456789";

        var res = str.Reverse().ToArray();

        Console.WriteLine(res); // 9876543210

        var arr = new int[]{1,2,3,4};

        arr = arr.Reverse().ToArray();

        Print(arr); // 4 3 2 1 

    }

    public static void Print(IEnumerable x){

        foreach(var i in x)

            Console.Write($"{i} ");

        Console.WriteLine();

    }

}