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.

Q: bob paid for charlie's college education. he is very grateful.

A: he
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Q: the dog chased the cat, which ran up a tree. it waited at the bottom.

A: it
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Q: i took the water bottle out of the backpack so that it would be handy.

A:
i, it
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