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: Water is the only substance on earth found naturally in ____ forms - solid, liquid, and gas.
Example Output: three

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

Example Input: Black contours correspond to ____ displacement.
Example Output:
zero