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: WA: Presentation Error)

import java.util.Scanner;

public class Main{
    public static void main(String[] args){
    	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 x=1;x<=a;x++){
    		for(int y=1;y<=b;y++){
    		if(x==1){
    		System.out.print("#");
    		}else if(x==a){
    		System.out.print("#");
    		}else if(y==1 || y==b){
    		System.out.print("#");
    		}else if(y<b){
    		System.out.print(".");
    		}
    		}
    		System.out.println("");
    		}
    		}
    }
}
}