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 PHP (judge verdict: Wrong Answer)

<?php
  while (true) {
    $height_width = explode(" ", trim(fgets(STDIN)));
    $h = $height_width[0];
    $w = $height_width[0];
    if ($h == 0 && $w == 0) {
      break;
    }

    for($i = 0; $i <= $h; $i++){
      for($j = 0; $j <= $w; $j++){
        if ($i == 0 || $i == $h) {
          echo '#';
        } elseif ($j ==0 || $j == $w) {
          echo '#';
        } else {
          echo '.';
        }
      }
      echo PHP_EOL;
    }
    echo PHP_EOL;
  }