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: Birds have ____ beak, two wings, and two feet.
Example Output: one

Example Input: Body temperature attains ambient levels within four to ____ hours.
Example Output: six

Example Input: Electrodes are the place the ____ meet.
Example Output:
two