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)

h, w = gets.split.map(&:to_i)
while h != 0 || w != 0 do
for b in 1..w do
	print "#"
end
puts
	for a in 3..h do
		print "#"
		for b in 3..w do
			print "."
		end
		print "#"
		puts
	end
	for b in 1..w do
	print "#"
end
puts
h, w = gets.split.map(&:to_i)
end