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: the drain is clogged with hair. it has to be removed.
Example Output: it

Example Input: adam can't leave work here until bob arrives to replace him. if bob had left home for work on time, he would be here by this time.
Example Output: him, he, this

Example Input: john was jogging through the park when he saw a man juggling watermelons. he was very impressed.
Example Output:
he