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 input = new Scanner(System.in);
		int h, w;
		while(true)
		{
			h=input.nextInt();
			w=input.nextInt();
			if(h == 0 && w == 0)
				break;
			else {
				for(int i = 0; i < h; i++)
				{
					for(int k = 0; k < w; k++)
					{
						if(i == 0 || i == h-1 || k == 0 || k == w-1)
							System.out.print("#");
						else
							System.out.print(".");
					}
					System.out.println();
				}
			}
			System.out.println();
		}
	}
}