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: Warts have a finite life span of anywhere from six months up to ____ years.
Example Output: five

Example Input: Pertussis is highly contagious with symptoms that can linger six to ____ weeks.
Example Output: ten

Example Input: Primates can move on ____ legs or four.
Example Output:
two