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 manager told the hairdresser that she did a good job .

Ex Output:
the, hairdresser, she


Ex Input:
The supervisor was worried about a visit from the auditor because she is a very strict person .

Ex Output:
the, auditor, she


Ex Input:
The manager demanded to be seen by the nurse but she was busy with another patient .

Ex Output:

the, nurse, she