as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
group the following list of animals by size. output the names of the animals in each group. 

hippopotamus, elephant, lion, giraffe, gorilla, ocelot, beaver
user
small group: ocelot, beaver. 

medium group: lion, giraffe. 

large group: hippopotamus, elephant, gorilla.
assistant