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.*;
import java.lang.*;

public class Solution{
    
    public static void main(String args[]) {
        
        Scanner scan = new Scanner(System.in);
        
        int n = scan.nextInt();
        int m = scan.nextInt();
        int k = 0;

        for(int i=1;i<=n;i++){
            if(i%2==0){k++;}
            for(int j=1;j<=m;j++){
                if(i%2!=0){
                    System.out.print("#");
                    continue;
                }
                if(i%2==0){
                    if(j==m&&k%2!=0){System.out.print("#");continue;}
                    if(j==1&&k%2==0){System.out.print("#");continue;}
                    System.out.print(".");
                }
            }
            System.out.print("\n");
        }
    }
}