Write a function to check whether the given month name contains 28 days or not.
def check_monthnum(monthname1):
  if monthname1 == "February":
    return True
  else:
    return False
<s>[INST]<<SYS>>Given a task and its code, generate test cases for the code.<</SYS>>Write a function to check whether the given month name contains 28 days or not.
def check_monthnum(monthname1):
  if monthname1 == "February":
    return True
  else:
    return False[/INST]assert check_monthnum("February")==True
assert check_monthnum("January")==False
assert check_monthnum("March")==False</s>