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 sc = new Scanner(System.in);
		int h, w;
		while(true){
			h = sc.nextInt();
			w = sc.nextInt();
			if(h==0 && w==0)break;
			if(h<=300 && w<=300){
				for(int i=0; i<h; i++){
					for(int j=0; j<w; j++){
						if(i==0 || (i+1)==h || j==0 || (j+1)==w){
							System.out.print("#");
						} else{
							System.out.print(".");
						}
					}
					System.out.println();
				}
				System.out.println();
			}
		}
	}
}