Fox Ciel starts to learn programming. The first task is drawing a fox! However, that turns out to be too hard for a beginner, so she decides to draw a snake instead.

A snake is a pattern on a n by m table. Denote c-th cell of r-th row as (r, c). The tail of the snake is located at (1, 1), then it's body extends to (1, m), then goes down 2 rows to (3, m), then goes left to (3, 1) and so on.

Your task is to draw this snake for Fox Ciel: the empty cells should be represented as dot characters ('.') and the snake cells should be filled with number signs ('#').

Consider sample tests in order to understand the snake pattern.

Input

The only line contains two integers: n and m (3 ≤ n, m ≤ 50). 

n is an odd number.

Output

Output n lines. Each line should contain a string consisting of m characters. Do not output spaces.

Examples

Input

3 3


Output

###
..#
###


Input

3 4


Output

####
...#
####


Input

5 3


Output

###
..#
###
#..
###


Input

9 9


Output

#########
........#
#########
#........
#########
........#
#########
#........
#########
import java.util.Scanner;
public class HelloWorld{
    int a, b;
    public static void main(String []args){
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int m = in.nextInt();
        char[][] snake = new char[n][m];
        for (int i = 0; i < n; i++){
            for (int j = 0; j < m; j++){
                if (i % 2 == 0)
                    snake[i][j] = '#';
                if (i % 2 == 1 && i % 4 == 1){
                    if (j == m - 1)
                       snake[i][j] = '#';
                    else 
                        snake[i][j] = '.';
                }
                if (i % 2 == 1 && i % 4 == 3){
                    if (j == 0)
                       snake[i][j] = '#';
                    else 
                        snake[i][j] = '.';
                }
                System.out.print(snake[i][j]);
            }
            System.out.println(" ");
         }
     }
}