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:
i couldn't put the pot on the shelf because it was too tall.

Ex Output:
i, it


Ex Input:
although they ran at about the same speed, sue beat sally because she had such a good start.

Ex Output:
they, she


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

Ex Output:

he