You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
Indicate all the pronouns (they, them, you, he, his, her, you, it, etc.) present in the given sentence. If there are multiple such pronouns in a sentence, then list them in the order of their first appearance in the given sentence. If a pronoun appears multiple times in a sentence, list it only once.

the user changed his password from grwqwu8jyc toÂ willow-towered canopy huntertropic wrestles as it was easy to remember.
Solution: his, it
Why? In this statement, 'it' is the pronoun used for password, and 'his' is used for the user.

New input: many people start to read paul's books and can't put them down. they are gripped because paul writes so well.
Solution:
them, they