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: ann asked mary what time the library closes, but she had forgotten.
Example Output: she

Example Input: john was doing research in the library when he heard a man humming and whistling. he was very annoyed.
Example Output: he

Example Input: there is a pillar between me and the stage, and i can't see around it .
Example Output:
me, i, it