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) {

		int g,r;

		Scanner scan = new Scanner(System.in);

		while(true)
		{
			g = scan.nextInt();
			r = scan.nextInt();

			if( (g|r) == 0) break;

			for(int i=0; i<g; i++)
			{
				for(int j=0; j<r; j++)
				{
					if(i==0 || i==(g-1) )//Line0 or LastLine
					{
						System.out.print("#");
					}
					else
					{
						if(j==0 || j==(r-1) ) System.out.print("#");
						else System.out.print(".");
					}
				}

				System.out.println();
			}

			System.out.println();

		}

		scan.close();

	}
}