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;
        int[] array = new int[2];
        
        i = 1;
        int x;
        int y;
        while (i != 0) {
            for (i = 0; i < 2; i++) {
                array[i] = sc.nextInt();
            }
            if(array[0] == 0 && array[1] == 0) break;
            for(x=0;x<array[0];x++){
                for(y=0;y<array[1];y++){
                    if(x==0 || x==array[0]-1){
                        System.out.print("#");
                    }else if(y==0 || y==array[1]-1){
                        System.out.print("#");
                    }else{
                        System.out.print(".");
                    }
                }
                System.out.println("");
            }
            System.out.println("");
        }
        sc.close();
    }
}