classify each of the following as living or non-living: dog, table, cat, tree, pen, book.
living: dog, cat, tree
non-living: table, pen, book
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: classify each of the following as living or non-living: dog, table, cat, tree, pen, book.
### Input: 
### Response: living: dog, cat, tree
non-living: table, pen, book