using System;

public class Program

{

    public static void Main()

    {

        // Application

        // Declare a 5 * 5 grid

        string[][] displayCard = new string[5][];

        for(int x = 0; x < displayCard.Length; x++)

            displayCard[x] = new string[5];

        Random rnd = new Random();

        int tempHolder = 0;

        for(int x = 0; x < displayCard.Length; x++) // rows

        {

            for(int y = 0; y < displayCard[x].Length; y++) // columns

            {

                tempHolder = rnd.Next(0, 15) + 1;

                tempHolder += (y * 15);

                displayCard[x][y] = tempHolder + "";

                bool duplicate = false;

                // checking for duplicates

                if(x > 0) //because this is the first number x = 0 cannot have duplicates

                {

                    for(int z = 0; z < x; z++)

                    {

                        if(tempHolder == int.Parse(displayCard[z][y]))

                        {

                            Console.WriteLine("Duplicate detected!");

                            duplicate = true;

                            break;

                        }

                    }

                }

                if(!duplicate)

                    displayCard[x][y] = tempHolder + "";

                else

                    y--;

            }

        }

        displayCard[2][2] = "FRE";

        Console.WriteLine("-B-\t" + "-I-\t" + "-N-\t" + "-G-\t" + "-O-\t");

        // display card

        for(int x = 0; x < displayCard.Length; x++) // rows

        {

            for(int y = 0; y < displayCard[x].Length; y++) // columns

            {

                Console.Write(displayCard[x][y] + "\t");

            }

            Console.WriteLine();

        }

    }

}