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: Primates have ____ digits on their forelimbs.

Output: five


Input: Consider Input: Elephants give birth to ____ calf every four to nine years on average.

Output: one


Input: Consider Input: Most retarded children have ____ normal parents.


Output: two