using System;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        string cep = "12445-456";

         Regex rx = new Regex(@"^[0-9]{5}-[0-9]{3}$");

            Console.Write(rx.IsMatch(cep));

        if(rx.IsMatch(cep))

            Console.Write("Passou");

    }

}