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: Wrong Answer)

import java.io.*;

public class Main{
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		while(true){
			String line = br.readLine();
			String[] str = line.split(" ");
			int h = Integer.parseInt(str[0]);
			int w = Integer.parseInt(str[1]);
			if ( h == 0 && w == 0 ){ //??\????????¨??????0
				break;
			}

			for (int i = 0; i < h ; i++ ) {
				for (int k = 0; k < w ; k++ ) {
					if ( i == 0 || i == (h-1)) {
						System.out.print("#");
					}else{
						if ( k == 0 || k == (w-1)) {
							System.out.print("#");
						}else{
							System.out.print(".");
						}
					}
					System.out.print("\n");
				}
			}
			System.out.print("\n");
		}
	}
}