Identify the lexical categories of the underlined words.
The cat purred contentedly.
The: article, cat: noun, purred: verb, contentedly: adverb.
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Identify the lexical categories of the underlined words.

### Response:
The: article, cat: noun, purred: verb, contentedly: adverb.