You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
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.

Female snakes incubate eggs inside of their bodies, giving birth to live young of ____ or more.
Solution: ten
Why? Snakes give birth to minimum ten young ones so ten is a correct answer.

New input: All ticks have three pairs of legs during the immature stage and ____ pairs as an adult.
Solution:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
four