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 input = new Scanner(System.in);
        while(true){
            int H = input.nextInt();
            int H1 = H - 2;
            int W = input.nextInt();
            int W1 = W - 2;
            if(H == 0 && W == 0){
                break;
            }
            for(int a = 0; a < W; a++){
                System.out.printf("#");
            }
            System.out.printf("\n");
            //第一行目の”＃”
            for(int b = 0; b < H1; b++){
                System.out.printf("#");
                for(int c = 0; c < W1; c++){
                    System.out.printf(".");
                }
                System.out.printf("#\n");
            }


            for(int a = 0;a < W; a++){
                System.out.printf("#");
            }
            //最後行目の”＃”

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