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
make a list of countries that have adopted a unicameral system of government.
user
- austria
- denmark
- finland
- iceland
- the netherlands
- norway
- sweden
- ukraine
-andorra
- brunei
- cameroon
- costa rica
- guatemala
- laos
- nepal
- panama 
- switzerland
- vatican city
- yemen
assistant