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
create a valid regular expression.
user
^(([a-za-z0-9]+_+)|([a-za-z0-9]+\-+)|([a-za-z0-9]+\.+)|([a-za-z0-9]+\++))*[a-za-z0-9]+@{1}((\w+\-+)|(\w+\.))*\w{1,}\.{1}[a-za-z]{2,63}$
assistant