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: Elephants have five toes on the fore feet and ____ on the hind feet.
Example Output: four

Example Input: Blood donors can give blood every ____ weeks, or six times a year.
Example Output: eight

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