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)

public class Main {
	public static void main(String[] args) {
		try (java.util.Scanner sc = new java.util.Scanner(System.in)) {
			while (true) {
				int H = sc.nextInt();
				int W = sc.nextInt();
				if (H == 0 && W == 0) {
					break;
				}

				for (int h = 0; h < H; h++) {
					for (int w = 0; w < W; w++) {
						if (h == 0 || h == H - 1 || w == 0 || w == W - 1) {
							System.out.print("#");
						} else {
							System.out.print(".");
						}
					}
					System.out.println();
				}
				System.out.println();
			}
		}
	}
}