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.

Example Input: the dog chased the cat, which ran up a tree. it waited at the top.
Example Output: it

Example Input: joe's uncle can still beat him at tennis, even though he is 30 years younger.
Example Output: him, he

Example Input: many people start to read paul's books and can't put them down. they are popular because paul writes so well.
Example Output:
them, they