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: Most healthy men experience about three to ____ erections in their sleep each night.
Example Output: five

Example Input: Some adjectives have ____ forms, others have four.
Example Output: two

Example Input: Male cats are approximately ____ times as likely to be infected as females.
Example Output:
three