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");
}