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 Ruby (judge verdict: WA: Presentation Error)

loop{
  h,w = gets.split.map(&:to_i)
  break if h == 0 && w == 0
  (1..h).each { |i| 
    if i == 1
      puts "#" * w
    elsif i == h
      puts "#" * w
    else
      (1..w).each {|j|
        if j == 1
          print "#"
        elsif j == w
          print "#"
        else 
          print "." 
        end
      }
      puts
    end
  }
}