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 sc = new Scanner(System.in);
		int i, j;
		while(true){
			int H = sc.nextInt();
			int W = sc.nextInt();
			
			if(H == 0 && W == 0) break;
			
			for(i = 0; i < H; i++){
				for(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();
		}
	}
}