Classify the following words by their grammatical categories: walk, interesting, quickly
Walk: Verb
Interesting: Adjective
Quickly: Adverb
Below is an instruction that describes a task, write a response that appropriately completes the request.

### Instruction:
Classify the following words by their grammatical categories: walk, interesting, quickly

### Response:
Walk: Verb
Interesting: Adjective
Quickly: Adverb