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: Tall fescue produces the ____ diazaphenanthrene alkaloids, perlolidone and perloline.
Example Output: two

Example Input: Account is a ____ character code that describes the basic accounting classifications.
Example Output: six

Example Input: Earth is believed to be almost ____ billion years old.
Example Output:
five