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 true

	aryMondai = gets.split.map(&:to_i);
	
	num1 = aryMondai[0];
	num2 = aryMondai[1];
	
	if num1 == 0 && num2 == 0 then
		break;
	end
	
	for i in 0..num1-1 do
		
		for j in 0..num2-1 do
		
			if i == 0 || i + 1 == num1 || j == 0 || j + 1 == num2 then
				
				print "#";
				
			else
				
				print ".";	
				
			end
		
		end
		
		print "\r\n";
	end
	
	print "\r\n";
end