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 Python3 (judge verdict: WA: Presentation Error)

figure = ''
height, width = [int(x) for x in input().split()]
while height or width:
    side = ('#' * width) + '\n'
    fill = '#' + ('.' * (width-2)) + '#\n'
    rect = side + (fill * (height-2)) + side
    figure += rect + '\n'
    height, width = [int(x) for x in input().split()]
 
print(figure)