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.

Input: Consider Input: Some bird feeders have ____ perches at all, but neither do tree trunks.

Output: no

Input: Consider Input: Niobium occurs primarily in ____ minerals, columbite and pyrochlore.

Output: two

Input: Consider Input: Whales are divided into ____ categories, based on their teeth.
Output: two