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)

#!/usr/bin/env ruby

if __FILE__ == $0
	loop do
		h, w = gets.split.map { |x| x.to_i }
		if h == 0 and w == 0 then
			break
		end

		ht = "#"*w+"\n"
		md = "#"+"."*(w-2)+"#\n"
		puts ht + md*(h-2) + ht + "\n"
	end
end