students 2

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Security.Cryptography.X509Certificates;

namespace classes
{
    class Student
    {
        public string FirstName { get; set; }
        public string LasttName { get; set; }
        public int Age { get; set; }
        public string Hometown { get; set; }

    }
    class Program
    {
        static void Main(string[] args)
        {
            string[] input = Console.ReadLine().Split().ToArray();

            List<Student> list = new List<Student>();

            while (input[0] != "end")
            {

                string firstName = input[0];
                string lastName = input[1];
                int age = int.Parse(input[2]);
                string hometown = input[3];

                Student student = list.FirstOrDefault(x => x.FirstName == firstName && x.LasttName == lastName);

                if (student == null)
                {
                    list.Add(new Student()
                    {
                        FirstName = firstName,
                        LasttName = lastName,
                        Age = age,
                        Hometown = hometown
                    });
                }
                else
                {
                    student.FirstName = firstName;
                    student.LasttName = lastName;
                    student.Age = age;
                    student.Hometown = hometown;
                }

                input = Console.ReadLine().Split().ToArray();
            }

            string last = Console.ReadLine();

            List<Student> filtered = list.Where(x => x.Hometown == last).ToList();

            foreach (var student in filtered)
            {
                Console.WriteLine($"{student.FirstName} { student.LasttName} is { student.Age } years old.");
            }

        }
    }
}