In this task, you will be given a sentence, and you need to identify the set of coreference words. Coreferences are generally a set of words in the text that refer to the same person or thing. Your output set of coreference words must be strictly present in the given input sentence. Do not use any outside knowledge to create the set of coreference words. If there is a 'the' article before the person or thing you should include 'the' as well. Please separate the coreference words by commas in the output.

Ex Input:
The laborer built the librarian a bookshelf because he was paid .

Ex Output:
The, laborer, he


Ex Input:
The developer argued with the designer because her idea cannot be implemented .

Ex Output:
the, designer, her


Ex Input:
The CEO ordered the cleaner out of the room because she was nosey .

Ex Output:

the, cleaner, she