using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Enter the Book Code of Length 18 : ");

        string code = Console.ReadLine();

        if (code.Length == 18)

        {

            int DeptCode =Convert.ToInt32(code.Substring(0,3));

            int Publication =Convert.ToInt32(code.Substring(3,4));

            int NoOfpages =Convert.ToInt32(code.Substring(7,5));

            string BookId =code.Substring(12,6);

            Char Id = Convert.ToChar(BookId.Substring(0,1));

            var BookNo = BookId.Substring(1,5);

            Console.WriteLine();

            if((DeptCode == 101) || (DeptCode == 102) || (DeptCode == 103))

            {

                Console.WriteLine("Department Code : "+DeptCode);

            }

            else

            {

                Console.WriteLine("Invalid Department Code");

            }

            if ((Publication >= 1900) && (Publication <= 2020))

            {

                Console.WriteLine("Year Of Publication : " +Publication);

            }

            else

            {

                Console.WriteLine("Invalid Year Of Publication");

            }

            if ((NoOfpages >= 00001) || (NoOfpages <= 99999))

            {

                Console.WriteLine("Number Of Pages : " +NoOfpages);

            }

            else

            {

                Console.WriteLine("Invalid Number Of Pages");

            }

            if (Char.IsLetter(Id))

            {

                Console.WriteLine("Book ID : "+BookId);

            }

            else

            {

                Console.WriteLine("Invalid Book Id ....It starts with Character");

            }

        }

        else

        {

            Console.WriteLine();

            Console.WriteLine("Invalid Book Code ");

        }

    }

}