Classify each of the following as either round or square shape: wheel, paper napkin, building block, ring, coin, ball, grid, bread, bubble, dice, hula hoop, window, stamp, earth, crossword, tambourine, bagel, keyboard key, cube, letter O.
Objects that have circular (round) shape include: bagel, ball, bubble, coin, earth, hula hoop, letter O, ring, tambourine, wheel.
Objects that have square shape include: bread, building blocks, crossword, cube, dice, grid, keyboard key, paper napkin, stamp, window.
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 either round or square shape: wheel, paper napkin, building block, ring, coin, ball, grid, bread, bubble, dice, hula hoop, window, stamp, earth, crossword, tambourine, bagel, keyboard key, cube, letter O.
### Input: 
### Response: Objects that have circular (round) shape include: bagel, ball, bubble, coin, earth, hula hoop, letter O, ring, tambourine, wheel.
Objects that have square shape include: bread, building blocks, crossword, cube, dice, grid, keyboard key, paper napkin, stamp, window.