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.

Input: Consider Input: sid explained his theory to mark but he couldn't convince him.

Output: his, he, him


Input: Consider Input: bob paid for charlie's college education. he is very generous.

Output: he


Input: Consider Input: frank felt crushed when his longtime rival bill revealed that he was the winner of the competition.


Output: his, he