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.

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

Ex Output:
it, he


Ex Input:
sid explained his theory to mark but he couldn't understand him.

Ex Output:
his, he, him


Ex Input:
i took the water bottle out of the backpack so that it would be lighter.

Ex Output:

i, it