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: 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

Example Input: frank felt vindicated when his longtime rival bill revealed that he was the winner of the competition.
Example Output: his, he

Example Input: the drain is clogged with hair. it has to be removed.
Example Output:
it