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.InputMismatchException;
import java.util.Scanner;

public class Main{


	public static void main(String[] args){

    	Scanner scan = new Scanner(System.in);

			while(true){
				try{
            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||j==0||j==W-1){System.out.print('#');}
					else{System.out.print('.');}
				}System.out.print('\n');
			  }System.out.print('\n');

				}catch(InputMismatchException e){
					System.out.println("??¨??????:"+e);

				}

			}
        	scan.close();


	}

}