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: All crabs have ____ pair of chelipeds and four pairs of walking legs .
Example Output: one

Example Input: Most insects have one or ____ pairs of wings.
Example Output: two

Example Input: Dairy farmers milk their cows twice, sometimes ____ times a day, every day of the year.
Example Output:
three