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)

array = Array.new
while true
	a = gets.split(" ").map{|e|e.to_i}
	break if a[0] == 0 && a[1] == 0
	array.push a
end

array.each{|a|
	a[0].times{|a0|
		a[1].times{|a1|
			if a0 == 0 || a0 == a[0]-1 || a1 == 0 || a1 == a[1]-1
				print "#"
			else
				print "."
			end
		}
		puts ""
	}
	puts ""
}