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

public class Main {

  public static void main(String[] args) throws IOException {
    BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
    String readValue;
    while ((readValue = reader.readLine()) != null) {
      int h = Integer.parseInt(readValue.split(" ")[0]);
      int w = Integer.parseInt(readValue.split(" ")[1]);
      if (h == 0 && w == 0)
        break;
      for (int i = 0; i < h; i++) {
        for (int j = 0; j < w; j++) {
          System.out.print((i == 0 || i == h-1) || (j == 0 || j == w-1) ? "#": ".");
        }
        System.out.println();
      }
      System.out.println();
    }
  }

}