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

Example Input: Team handball is played with seven players per side, six court players, and ____ goalkeeper.
Example Output: one

Example Input: Some boys even have ____ urethras.
Example Output:
two