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;

class Main
{
	public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
		
		int[] a = new int[300];
		int[] b = new int[300];
		int i = 0;
		
		a[0] = 1;
		b[0] = 1;
		
		while(!(a[i] == 0 && b[i] == 0)){
			i++;
			a[i] = scan.nextInt();
			b[i] = scan.nextInt();}
			
		for(int q=1; q<i; q++){
			for(int j=0; j<a[q]; j++){
				for(int h=0; h<b[q]; h++){
				if(j==0 || j==a[q]-1 || h==0 || h==b[q]-1){
					System.out.print("#");}
				else{
					System.out.print(".");}}
				System.out.print("\n");}
				System.out.print("\n");}
	}
}