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) {
		int W,H,a,b;
		Scanner br = new Scanner(System.in);
		while(true){
			H=br.nextInt();
			W=br.nextInt();
			if(H==0 && W==0 ){
				break;
			}else{
				for(a=1;a<=H;a++){
					if(a==1 || a==H){
						for(b=1;b<=W;b++){
							System.out.print("#");
						}
						System.out.println();
					}else{
						for(b=1;b<=W;b++){
							if(b==1 || b==W){
								System.out.print("#");
							}else{
								System.out.print(".");
							}
						}
						System.out.println();
					}
				}
			}
		}
	}
}