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 scan = new Scanner(System.in);
       while(true){
           int h = scan.nextInt();
           int w = scan.nextInt();
           if(h == 0 && w == 0)break;


           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();
       }
       scan.close();
    }
}