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 inp = new Scanner(System.in);

        while (true) {

            int h = inp.nextInt();
            int w = inp.nextInt();
            if (h == 0 && w == 0) {
                break;
            } else if (h >= 3 && w < 300) {
                for (int i = 0; i < h; i++) {
                    for (int j = 0; j < w; j++) {

                        if (i == 0 || i == (h - 1)) {
                            System.out.print('#');
                        } else {
                            if (j == 0 || j == (w - 1)) {
                                System.out.print('#');
                            } else {
                                System.out.print('.');
                            }
                        }
                    }
                    System.out.println();
                }
                System.out.println();
            }

        }
    }
}