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 species have four toes, ____ of which are forward-pointing.
Example Output: three

Example Input: Spiders have eight jointed legs and ____ body parts.
Example Output: two

Example Input: Insects have three body parts and ____ legs.
Example Output:
six