Given a sentence, fill out the missing word with a 'no' or a number (between zero and ten). You should write the numbers with english alphabet, like: four instead of 4.

Example Input: Kayak paddles have ____ blades, canoe paddles have one.
Example Output: two

Example Input: Marsupials have ____ vaginas and a double uterus.
Example Output: two

Example Input: Sexual maturity occurs between the ages of ____ and ten.
Example Output:
five