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);
		while (sc.hasNext()) {
			String input = sc.nextLine();
			String[] array = input.split(" ");
			int h = Integer.parseInt(array[0]);
			int w = Integer.parseInt(array[1]);
			if (h == 0 && w == 0) {
				System.exit(0);
			}
			for (int i = 0; i < h; i++) {
				if (i == 0 || i == h - 1) {
					for (int j = 0; j < w; j++) {
						System.out.print("#");
					}
				} else {
					for (int j = 0; j < w; j++) {
						if (j == 0 || j == w - 1) {
							System.out.print("#");
						} else {
							System.out.print(".");
						}
					}

				}
				System.out.print("\n");
			}
			System.out.print("\n");

		}
	}
}