using System;

public class Program

{

    public static void Main()

    {

        int val = 10;

    Console.WriteLine("(A)");

         for (int i = 1; i <= val; ++i) 

         {

             for (int j = 1; j <= i; ++j)

             {

                Console.Write("*");

             }

         Console.WriteLine();

         }

         Console.WriteLine();

    Console.WriteLine("(B)");

         for (int row = val; row >= 1; --row) 

         {

             for (int col = 1; col <= row; ++col)

             {

                 Console.Write("*");

             }

            Console.WriteLine();

         }      

            Console.WriteLine();

     Console.WriteLine("(C)");

            for (int i1 = val; i1 >= 1; i1--)

            {

                for (int j1 = 1; j1 <= val - i1; j1++)

                {

                Console.Write(" ");

                }

                for (int k1 = 1; k1 <= i1; k1++)

                {

                Console.Write("*");

                }

                Console.WriteLine("");

            }

            Console.WriteLine();

    Console.WriteLine("(D)");

            for (int i2 = 1; i2 <= val; i2++)

            {

                for (int j2 = 1; j2 <= val - i2; j2++)

                {

                    Console.Write(" ");

                }

                for (int k2 = 1; k2 <= i2; k2++)

                {

                    Console.Write("*");

                }

                Console.WriteLine("");

            }

    }

}