input: Write a function to clean up a list of emails and put them into a new list. Remove any '+' symbols and '+.uk' from the emails. If the original list is empty, the new list should also be empty.
  original_list = ['bob@example.com', 'alice+bob@cafe.com', 'bob@gmail.com.uk', 'bob+alice@example']
  assert clean_up_emails(original_list) == ['bob@example.com', 'alice@cafe.com', 'bob@gmail.com', 'bob@example']
  assert clean_up_emails([]) == []
output: def clean_up_emails(emails):
      cleaned_emails = []
      for email in emails:
          email = email.split('+')[0]
          email = email.replace('.uk', '')
          cleaned_emails.append(email)
      return cleaned_emails