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: Lunar eclipses occur every ____ months, on average.

Output: six


Input: Consider Input: Females usually reach sexual maturity at about four years of age, males at about ____ years.

Output: six


Input: Consider Input: Head lice can survive on the scalp for about ____ weeks.


Output: three