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;

class Main{
  private static int H,W;

  public static void main(String[] args){
    
    Scanner s= new Scanner(System.in);
   
   while(true){
   H=s.nextInt();
   W=s.nextInt();
   
   if(H==0&&W==0){
       break;
   }
   for(int i = 0;i<H;i++){
       
       for(int x=0;x<W;x++){
           
          if(i==0||i==H-1){
               System.out.print("#");
           }else
           
           {if(x==0||x==W-1){
               System.out.print("#");
               
       }else{
            System.out.print(".");
       }
           }
       }
       System.out.println("");
       
   }System.out.println("");
   
  }
  }   
  
  }