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.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
	public static void main(String[] args)throws IOException{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringBuilder sb = new StringBuilder();

		while(true){
			String[] inputData = br.readLine().split(" ");
			int h = Integer.parseInt(inputData[0]);
			int w = Integer.parseInt(inputData[1]);

			if(h == 0 && w == 0){
				break;
			}
			for(int i = 0; i < h; i ++){
				for(int j = 0; j < w ; j ++){
					if(i == 0 || j == 0 || i == h-1 || j == w-1){
						sb.append("#");
					}else{
						sb.append(".");
					}
				}
				sb.append("\n");
			}
			sb.append("\n");
		}

		System.out.println(sb);
	}

}