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: Wrong Answer)

import java.util.Scanner;

public class Main {
  public static void main(String[] args) {
    Scanner scan= new Scanner(System.in);
    int a,b,i,j;
    a=scan.nextInt();
    b=scan.nextInt();


      for (j=0;j<b ;j++ ) {
        System.out.print("#");
      }
      if (a==0&&b==0) {
        ;
      }else{
      System.out.println(" ");
      }
      for(i=0;i<a-2;i++){
      System.out.print("#");
      for(j=0;j<b-2;j++){
      System.out.print(".");
    }
    System.out.println("# ");
  }
for(j=0;j<b;j++){  System.out.print("#");
}if (a==0&&b==0) {
  ;
}else{
System.out.println(" ");
}
    }

}