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