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: Seedlings normally can take up to ____ to five years to produce their first bloom.
Example Output: three

Example Input: Cytochrome oxidase consists of two cytochromes and ____ copper atoms.
Example Output: two

Example Input: Theophylline is given by mouth ____ times a day.
Example Output:
three