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: Accepted)

MODE = "stdio"

line = Array.new

if(defined? MODE)
  line = STDIN.read.split("\n")
else
  tmp = "\
  3 4
  5 6
  3 3
  0 0
  ".split("\n")
  tmp.each{|s|
    line << s.strip
  }
end
r=Array.new
r = line.map{|s|s.split(" ")}

r.each{|s| s.map!(&:to_i)}.each do |h,w|
  break if h==0 && w==0
  puts "#"*w
  (h-2).times do
    puts "#" + "."*(w-2) +"#"
  end
  puts "#"*w
  puts "\n"
end