using System;

public class StarDot

{

    public static void Main()

    {

        int rows = 15;

        int cols = 30;

        String[] OneD = new String[rows * cols];

        for(int i=0; i< (rows * cols); i++) {

            OneD[i] = " ";

            if(i > 2 * OneD.Length / 3) {

                OneD[i] = "*";

            }

        }

        OneD = Randomize(OneD);

        String[,] Grid = new String[rows, cols];

        Grid = Make2DArray(OneD, rows, cols);       

        Dump(Grid);     

    }

    public static String[] Randomize(String[] items)

    {

        Random rand = new Random();       

        for (int i = 0; i < items.Length - 1; i++)

        {

            int j = rand.Next(i, items.Length);

            String temp = items[i];

            items[i] = items[j];

            items[j] = temp;

        }

        return items;

    }   

    private static String[,] Make2DArray(String[] input, int height, int width)

    {

        String [,] output = new String [height, width];

        for (int i = 0; i < height; i++)

        {

            for (int j = 0; j < width; j++)

            {

                output[i, j] = input[i * width + j];

            }

        }

        return output;

    }

    public static void Dump(String[,] Grid){

        int rows = Grid.GetLength(0);

        int cols = Grid.GetLength(1);

        for(int i = 0; i< rows; i++) {

            String line = "";

            for(int j = 0; j < cols; j++) {

                line += Grid[i, j];

            }

            Console.WriteLine(line);

        }

    }   

}