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: bob paid for charlie's college education, but now charlie acts as though it never happened. he is very hurt.
Example Output: it, he

Example Input: paul tried to call george on the phone, but he wasn't available.
Example Output: he

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