using System;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        string cpf = '"'+"020.075..460-27"+'"';

        Regex cpf1 = new Regex(@"\b[0-9]{3}[.-]*[0-9]{3}[.-]*[0-9]{3}[.-]*[0-9]{2}\b");

        Console.WriteLine(cpf1.Replace(cpf, "*"));

        Regex cpf2 = new Regex(@"["+'"'+@"]\s*[0-9]{3}[.-]*[0-9]{3}[.-]*[0-9]{3}[.-]*[0-9]{2}\s*["+'"'+@"]");

        Console.WriteLine(cpf2.Replace(cpf, "*"));

        string creditCard = '"'+" 6205500000000000 "+'"';

        Regex creditCard1 = new Regex(@"\b[456]\d{3}(\s*\d{4}){3}\s*\d{0,3}\b");

        Console.WriteLine(creditCard1.Replace(creditCard, "*"));

        Regex creditCard2 = new Regex(@"["+'"'+@"]\s*[456]\d{3}(\s*\d{4}){3}\s*\d{0,3}\s*["+'"'+@"]");

        Console.WriteLine(creditCard2.Replace(creditCard, "*"));

        string cvv = '"'+" 237 "+'"';

        Regex cvv1 = new Regex(@"\b\d{3,4}\b");

        Console.WriteLine(cvv1.Replace(cvv, "*"));

        Regex cvv2 = new Regex(@"[" + '"' + @"]\s*\d{3,4}\s*[" + '"' + @"]");

        Console.WriteLine(cvv2.Replace(cvv, "*"));

    }

}