using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    class Program
    {
        /*static string TrocaCarater (string frase, int posi,char car)
        {
            char[] frase2 = frase.ToArray();
            frase2[posi] = car;
            return new string(frase2);
        }*/

        static void MostrarUltimaPalavra(string frase)
        {
            int posEspaco=0;
            for (int i = 0; i < frase.Length; i++)
                if (frase[i] == ' ')
                    posEspaco = i;

            // exercico 12
            for (int i = 0; i < posEspaco; i++)
                Console.Write(frase[i]);

                Console.WriteLine("");

            // exercico 13
            for (int i = posEspaco+1; i < frase.Length; i++)
                Console.Write(frase[i]);

            Console.WriteLine("");

        }


        static void Main(string[] args)
        {

            string f = "ola bom dia";
            int pos = 8;
            char c='*';
           // Console.WriteLine(TrocaCarater(f, pos, c));
            MostrarUltimaPalavra(f);
            Console.WriteLine("");

        }
    }
}