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: Rabbits have ____ incisors in the upper jaw where rodents have only two.

Output: four


Input: Consider Input: Girls have ____ ovaries.

Output: two


Input: Consider Input: Power is derived from ____ sources, money and people.


Output: two