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: Wrong Answer)

while true

 h,w = gets.split(' ').collect{|n|n.to_i}
 break if h==0 && w==0
 h.times do |hc|
  w.times do |wc|
   if wc==0 || wc==w-1
    print '#' 
    next
   end
   if hc==0 || hc==h-1
    print '#'
   else
    print '.'
   end
   puts
  end
 end
end