Problem:
Print a Frame

Draw a frame which has a height of H cm and a width of W cm. For example, the following figure shows a frame which has a height of 6 cm and a width of 10 cm.

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

Input

The input consists of multiple datasets. Each dataset consists of two integers H and W separated by a single space.

The input ends with two 0 (when both H and W are zero).

Output

For each dataset, print the frame made of '#' and '.'.

Print a blank line after each dataset.

Constraints

3 ≤ H ≤ 300

3 ≤ W ≤ 300

Sample Input

3 4
5 6
3 3
0 0

Sample Output

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

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

###
#.#
###

Solution in JAVA (judge verdict: Accepted)

import java.util.Scanner;


public class Main {
	public static void main(String[] args)
	{
		Scanner scanner = new Scanner(System.in);
		for(;;)
		{
			int w = scanner.nextInt();
			int h = scanner.nextInt();
			
			if(w==0 && h==0)
			{
				break;
			}
			
			for(int i=0; i<w; i++)
			{
				for(int j=0; j<h; j++)
				{
					if((j==0||j==h-1) || (i==0||i==w-1))
					{
						System.out.print("#");
					}
					else
					{
						System.out.print(".");
					}
				}
				System.out.println("");
			}
			System.out.println("");
		}
	}
}