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: Mature birds boast a wing span of ____ feet.
Example Output: six

Example Input: Males mature sexually as soon as ____ years of age.
Example Output: two

Example Input: Reality transcends the ____ states of waking, dream and deep sleep.
Example Output:
three