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: Photons have momentum but ____ mass or electrical charge.
Example Output: no

Example Input: Heart attacks occur most often around ____ in the morning.
Example Output: five

Example Input: Roots can grow deep in ____ years.
Example Output:
six