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: Romantic love involves ____ people.
Example Output: two

Example Input: Baboons can travel up to ____ miles a day.
Example Output: six

Example Input: Human existence has ____ aspects - physical, mental and spiritual.
Example Output:
three