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: Teething begins for most babies around ____ to six months.
Example Output: four

Example Input: Women normally have ____ ovaries.
Example Output: two

Example Input: Many animals use two or ____ forest structure types.
Example Output:
three