Nothing happens - its a simple multiplication table!

[tjnichols]

def create_multiplcation_table(width, height):
	output = ""
	num_chars = len(str(width*height)) + 1
    
	for a in range(1, height+1):
		for b in range(1, width+1):
			product = a * b
                        
			product_str = str(product)
			product_str = product_str.rjust(num_chars, " ")
			output += product_str + " "
		output += "\n\n"
					
	return ouput

def process_input(raw_input):
	try:
		value = int(raw_input)
	except ValueError:
		raise ValueError("%s is not an integer" % raw_input)
			
	if value <= 0:
		raise ValueError("All dimensions must be greater than zero.")
		
	return value

def get_user_input():
	values = []
	for prompt in ('Width', 'Height'):
		raw_input = input(prompt + ": ")
		processed_input = process_input(raw_input)
		values.append(processed_input)

	return values

def main():
	success = False
	try:
		width, height = get_user_input()
		success = True
	except Exception as e:
		print(e)
	except KeyboardInterrupt:
		print("\nGoodbye.")
		
	if success:
		ouput = create_multiplcation_table(width, height)
		print('\n\n' + output)

if __name__ == '__name__':
	main()

I run this and absolutely nothing happens. This is a video tutorial. I've gone over the code and compared it with the video and I don't see a difference.

Any help will be most appreciated!

Thanks!

Tonya