using System;
using System.Text.RegularExpressions;
using System.Linq;

public class Test
{
	public static void Main()
	{
		var tokens= Regex.Matches("com.example.is-this@myname", @"\w+|\W")
		.Cast<Match>()
		.Select(x=>x.Value)
		.Reverse();
		
		Console.WriteLine(string.Concat(tokens));
	}
}