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)

tmp = []
cou = "1"
while cou != [0, 0]
  i = gets.chomp.split.map(&:to_i)
  tmp.push(i)
  tmp.flatten!
  cou = i
end
tmp.delete(tmp[-1])
length = tmp.length/2
i = 0
length.times do
  h = tmp[i].to_i
  w = tmp[i+1].to_i
  hh = h-2
  ww = w-2
  
  w.times do
    print"#"
  end
  print"\n"
  hh.times do
    print"#"
    ww.times do
      print "."
    end
    print"#\n"
  end
  w.times do
    print"#"
  end
  i = i + 2
  print"\n"
end