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: Female dogs come into heat every ____ months or so.

Output: six


Input: Consider Input: Babies crawl into a pouch on the mother's belly and stay there ____ months.

Output: four


Input: Consider Input: Some ticks feed on only one host throughout all ____ life stages.


Output: three