Given the task definition, example input & output, solve the new input case.
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: the user changed his password from grwqwu8jyc toÂ willow-towered canopy huntertropic wrestles as it was easy to remember.
Output: his, it
In this statement, 'it' is the pronoun used for password, and 'his' is used for the user.

New input case for you: paul tried to call george on the phone, but he wasn't available.
Output:
he