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: Theobroma oil can exist in four different polymorphic forms of which only ____ is stable.
Example Output: one

Example Input: Coho usually live for ____ years and grow rapidly in their final year.
Example Output: three

Example Input: Some tropical species have ____ or three generations per year.
Example Output:
two