using System;

using System.Text.RegularExpressions;

public class Program

{

    private static readonly Regex WordCharacter = new Regex(@"\W");

    private static readonly Regex Whitespace = new Regex(@"\s+");

    public static void Main()

    {

        string term = "()5  +** .,  2 Ngaio%Street@!*&&*^&^$^%$^#%/?`~";

        term = WordCharacter.Replace(term, " ");

        term = Whitespace.Replace(term, " ").Trim();

​

        Console.WriteLine(term);

    }

}