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: WA: Presentation Error)

<?php

while(true){
    
    $inputs = explode(" ",trim(fgets(STDIN)));
    $h = $inputs[0];
    $w = $inputs[1];
    
    if($h == 0 && $w == 0){ break; }
    
    for ($i = 0; $i < $h; $i++) {
        
         for ($j = 0; $j < $w; $j++) {
             
            if(($i != 0) && ($i != ($h - 1)) && (($j != 0) && ($j != ($w - 1)))){
                print ".";
            } else {
                print "#";
            }
         }
         print PHP_EOL;
    }
    print PHP_EOL;
}
?>