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{
 public static void main(String[] arge){
     
Scanner sc=new Scanner(System.in);

while (true){ 

int a=sc.nextInt();
int b=sc.nextInt();

if(a==0 && b==0)
{break;}
else{
for ( int i = 0; i < a; i++ ){
for ( int j = 0; j < b; j++ ){
        if((i>0 && i<a-1) && (j>0 && j<b-1)){
            System.out.print(".");
        } else {
            System.out.print("#");
        }
    }
    System.out.println("");
} 
}
System.out.println("");	
}
}
}