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 was playing cards with adam and was way ahead. if adam hadn't had a sudden run of good luck, he would have lost.
Example Output: he

Example Input: the painting in mark's living room shows an oak tree. it is to the right of the bookcase.
Example Output: it

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