Create an appropriate input to the command to produce the output.
Output: 
Apple, air, animal, Astronaut
Command: "List all the words starting with letter 'A'."
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Create an appropriate input to the command to produce the output.

### Response:
Command: "List all the words starting with letter 'A'."