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)

inputs = []
loop do
    input = gets.split(" ")
    input.map!(&:to_i)
    if input[0] == 0 && input[1] == 0; break; end
    inputs << input
end
inputs.each do |input|
    input[0].times do |h|
        input[1].times do |w|
            if h == 0 || h == input[0]-1 || w == 0 || w == input[1]-1
                print "#"
            else
                print "."
            end
        end
        print "\n"
    end
    print "\n"
end