using System;
class PersianRugs
{
    static void Main()
    {
        int n = int.Parse(Console.ReadLine());
        int d = int.Parse(Console.ReadLine());
        int dimention = 2 * n + 1;
        int startslash = 0;
        int endslash = n;
        int startTri = 1 + d;
        int endTri = n;

        int[,] matrix = new int[dimention, dimention];

        for (int row = 0; row < dimention / 2; row++)
        {
            for (int col = 0; col < dimention / 2; col++)
            {
                if (startslash <= col && endslash >= col)
                {
                    if (d < n - 2 && col > startTri && col <= endTri)
                    {
                        matrix[row, col] = 4;
                        matrix[dimention - 1 - row, col] = 4;
                        matrix[row, dimention - 1 - col] = 4;
                        matrix[dimention - 1 - row, dimention - 1 - col] = 4;
                    }
                    else
                        if (d <= n - 2 && col >= startTri && col <= endTri)
                        {
                            matrix[row, col] = 2;
                            matrix[dimention - 1 - row, col] = 3;
                            matrix[row, dimention - 1 - col] = 3;
                            matrix[dimention - 1 - row, dimention - 1 - col] = 2;

                        }
                        else
                            if (startslash + 1 <= col && endslash >= col)
                            {
                                matrix[row, col] = 1;
                                matrix[dimention - 1 - row, col] = 1;
                                matrix[row, dimention - 1 - col] = 1;
                                matrix[dimention - 1 - row, dimention - 1 - col] = 1;
                            }
                            else
                            {
                                matrix[row, col] = 2;
                                matrix[dimention - 1 - row, col] = 3;
                                matrix[row, dimention - 1 - col] = 3;
                                matrix[dimention - 1 - row, dimention - 1 - col] = 2;
                            }
                }
            }
            startslash++;
            startTri++;
        }

        for (int row = 0; row < dimention; row++)
        {
            int col = n;
            matrix[row, col] = 1;
            matrix[n, col] = 5;
        }

        for (int row = 0; row < dimention; row++)
        {
            int col = n;
            if (n - d - 1>= row && ((matrix[row, n - 1] == 2 && matrix[row, n-2] != 0) || matrix[row, n-1] == 4))
            {
                matrix[row, col] = 4;
                matrix[dimention - 1 - row, col] = 4;
            }
        }


        for (int row = 0; row < dimention; row++)
        {
            for (int col = 0; col < dimention; col++)
            {
                if (matrix[row, col] == 0)
                {
                    Console.Write('#');
                }
                else if (matrix[row, col] == 1)
                {
                    Console.Write(' ');
                }
                else if (matrix[row, col] == 2)
                {
                    Console.Write('\\');
                }
                else if (matrix[row, col] == 3)
                {
                    Console.Write('/');
                }
                else if (matrix[row, col] == 4)
                {
                    Console.Write('.');
                }
                else if (matrix[row, col] == 5)
                {
                    Console.Write('X');
                }
            }
            Console.WriteLine();
        }

    }
}