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: Stems are of ____ types, flowering and vegetative.
Example Output: two

Example Input: Differentiation is caused by the energy going in ____ directions.
Example Output: two

Example Input: Positive numbers are more than ____ and negative numbers are less than zero.
Example Output:
zero