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)

while 
    x = gets()
    x = x.split
    if x[0].to_i == 0 && x[1].to_i == 0; break
    end
    a = x[0].to_i - 2
    puts "#" * x[1].to_i
    a.times do
    puts "#" + "." * (x[1].to_i - 2) + "#"
    end
    puts "#" * x[1].to_i
end