Classify each of the following objects as either heavy or lightweight: bubble, aircraft, bear, mouse, bus, raisin, strawberry, popcorn, elephant, piano, plastic cup, train, butterfly, whale, refrigerator, feather, pencil, ship, tree, flower.
Heavy weight objects include: aircraft, bear, bus, elephant, piano, refrigerator, ship, tree, train, whale.
Lightweight objects include: bubble, butterfly, feather, flower, mouse, pencil, plastic cup, popcorn, raisin, strawberry.
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 objects as either heavy or lightweight: bubble, aircraft, bear, mouse, bus, raisin, strawberry, popcorn, elephant, piano, plastic cup, train, butterfly, whale, refrigerator, feather, pencil, ship, tree, flower.
### Input: 
### Response: Heavy weight objects include: aircraft, bear, bus, elephant, piano, refrigerator, ship, tree, train, whale.
Lightweight objects include: bubble, butterfly, feather, flower, mouse, pencil, plastic cup, popcorn, raisin, strawberry.