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: Cytochrome oxidase consists of two cytochromes and ____ copper atoms.

Output: two


Input: Consider Input: Scorpions have ____ legs.

Output: eight


Input: Consider Input: Recent studies show that one in every ____ school children has a major allergy.


Output: five