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: Marine biologists have ____ theories on why whales breach.
Example Output: two

Example Input: Gibberellins are diterpenoids derived from four isoprenoid units forming a system of ____ rings.
Example Output: four

Example Input: Statistics show that at the age of seventy, there are ____ women to every man.
Example Output:
five