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: Most bioluminescence is blue for ____ reasons.
Example Output: two

Example Input: Penguins have ____ seasons in their year, as follows.
Example Output: four

Example Input: Buds are pink as the ____ sepals are pink and are lost when the flower blooms .
Example Output:
four