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: Cardinals have ____ main functions in the church.
Example Output: three

Example Input: Neutrons consist of one up quark and ____ down quarks.
Example Output: two

Example Input: Leeches usually have ____ jaws and make a Y-shaped incision.
Example Output:
three