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)

while(1)
h,w=gets.chomp.split(" ").map(&:to_i)
if(w==0&&h==0)
 break
end
j=0
while(j<h)
 i=0
 while(i<w)
  if(i*j*(w-i-1)*(h-j-1)==0)
   print"#"
  else
   print"."
  end
  i=i+1
 end
 print"\n"
 j=j+1
end
 print"\n"
end