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: Most children start primary school at ____ years of age.

Output: five


Input: Consider Input: Substance abusers have ____ hundred percent higher medical costs and benefits.

Output: three


Input: Consider Input: Tropical rainforests occur in ____ major geographical areas around the world .


Output: three