using System;

using System.Collections.Generic;

using System.Linq;          

public class Program

{  public class Human

    {

        private string firstname;

        private string lastname;

        private int yearsold;

        public Human()

        {}

        public Human(string firstname,string lastname, int yearsold)

        {

           this.firstname=firstname;

           this.lastname=lastname;

           this.yearsold=yearsold;

        }

        public string Firstname

        {

            get{return this.firstname;}

            set{this.firstname=value;}

        }

        public string Lastname

        {

            get{return this.lastname;}

            set{this.lastname=value;}

        }

        public int Yearsold

        {

            get{return this.yearsold;}

            set{this.yearsold=value;}

        }

        public void PrintInfo()

        {

          Console.WriteLine("Hello, {0} {1}.\nYou are {2} years old.\n", this.firstname, this.lastname, this.yearsold);

        }

    }

    public static void Main()

    {   

        Human b=new Human();

        Console.WriteLine("How many people would you like to add?");

        int c = int.Parse(Console.ReadLine());

        List<Human>people=new List<Human>();

        Console.WriteLine("Write name and years.");

        for (int i = 0; i < c; i++)

      {

         var info = Console.ReadLine()

         .Split();

         var person = new Human(info[0], info[1], int.Parse(info[2]));

         people.Add(person);

      } 

              people.OrderBy(a => a.Yearsold)

           .ToList()

           .ForEach(a => a.PrintInfo());    

    }

}