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)

h=[]; w=[]; i=0
loop do
  h0,w0=gets.split.map &:to_i
  h0==0&&break
  h<<h0; w<<w0
  i+=1
end
h.size.times do|i|
  puts "#"*w[i]
  (h[i]-2).times{print "#","."*(w[i]-2),"#\n"}
  puts "#"*w[i]
  print "\n"
end