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 Main {
    public static void main(String[] args){
        Scanner number = new Scanner(System.in);
        
        int n1 = number.nextInt();
        int n2 = number.nextInt();
        int m = 1;
        
        for(int i=1;i<=n1;i++){
            if(i%2==0 && m%2==0){
                System.out.print("#");
                
                for(int j=1;j<n2;j++){
                    System.out.print(".");
                }
                m++;
            }
            else if(i%2==0 && m%2!=0){
                for(int q=1;q<n2;q++){
                    System.out.print(".");
                }
                System.out.print("#");
                m++;
            }
            else{
                for(int k=1;k<=n2;k++){
                    System.out.print("#");
                }
            }
            System.out.println();
        }
        
        
    }
}
