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;
/** author@WanTedGuY-->*/
public class string
{
	public static void main(String[] args) {
			Scanner sc = new Scanner(System.in);
			int n = sc.nextInt();
			int m = sc.nextInt();
			int flag =0;
			for(int i=0;i<n;i++)
			{
				for(int j=0;j<m;j++)
				{
					if(i%2==0)
					{
						System.out.print("#");
					}
					else if(i%2==1 && flag==0)
					{
						if(j<m-1)
						{
							System.out.print(".");
						}
						else
						{
							flag = 1;
							System.out.print("#");
							
						}
					}
					else if(i%2==1 && flag==1)
					{
						if(j==0)
						{
							System.out.print("#");
						}
						else
						{
							System.out.print(".");
						}
						if(j==m-1)
						{
							flag=0;
						}

					}

					
				}
				System.out.println("");
			}
			
		}
			
}