using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        string s = "Hello1234 4566World";

        Console.WriteLine("Números:");

        foreach (char c in s.Where(x => char.IsNumber(x)).ToList())

        {

            Console.WriteLine(c);

        }

        Console.WriteLine("Letras:");

        foreach (char c in s.Where(x => char.IsLetter(x)).ToList())

        {

            Console.WriteLine(c);

        }

    }

}