input: Write a function that cleans up a list of emails and puts them into a new list. The function should remove any text after the '+' character and any '.uk' suffix from the emails. If the input list is empty, the function should return an empty list.
  
  def clean_emails(emails):
      clean_list = []
      for email in emails:
          email_without_plus = email.split('+')[0]
          email_without_dot_uk = email_without_plus.split('.uk')[0]
          clean_list.append(email_without_dot_uk)
      return clean_list
  
  assert clean_emails(['bob@example.com', 'alice+bob@cafe.com', 'bob@gmail.com.uk', 'bob+alice@example'])==['bob@example', 'alice@cafe', 'bob@gmail', 'bob@example']
  assert clean_emails([])==[]
output: def clean_emails(emails):
      clean_list = []
      for email in emails:
          email_without_plus = email.split('+')[0]
          email_without_dot_uk = email_without_plus.split('.uk')[0]
          clean_list.append(email_without_dot_uk)
      return clean_list