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: Mammals have ____ cervical vertebrae, a number that remains remarkably constant.

Output: seven


Input: Consider Input: Tuberculosis develops in ____ stages.

Output: two


Input: Consider Input: Most young children have only a mild flu-like illness without jaundice, or ____ symptoms at all.


Output: no