input: Write a function that takes a list of emails, removes any '+' and '.uk' occurrences, and returns the cleaned list of emails. If the input list is empty, it should return an empty list.
  assert remove_plus_uk(['bob@example.com', 'alice+bob@cafe.com', 'bob@gmail.com.uk', 'bob+alice@example'])==['bob@example.com', 'alice@cafe.com', 'bob@gmail.com', 'bob@example']
  assert remove_plus_uk([])==[]
output: def remove_plus_uk(emails):
      cleaned_emails = []
      for email in emails:
          if '+' in email:
              email = email[:email.index('+')] + email[email.index('@'):]
          if '.uk' in email:
              email = email.replace('.uk', '')
          cleaned_emails.append(email)
      return cleaned_emails