# Define a Users tuple containing at least three strings (all must be unique)
users = ('proview','brennan','yankees','jets')

# Define a Passwords tuple containing a password string for each user in the User tuple
passwords = ('web','patrick','champs','football')

# Ask the user for a username
username = raw_input('Please enter your username: ')

# Ask the user for a password
code = raw_input('Please enter your password: ')

# If the provided username is in the Users tuple (check by using the in operator)
if username in users:

    # Make a copy of the Users tuple as a LIST
    L_users = list(users)

    # Find the index that matches the username – use the index() method of lists
    place = users.index(username)

    # If the string in the Passwords tuple (at the index located above) matches
    if code == passwords[place]:

        # the user-provided password, confirm the match with a print statement
        print('Your username of "%s" and password of "%s" are correct, welcome!!\n' % (username,code))

        # In either case, print out the Users tuple and the Passwords tuple
        print(users)
        print(passwords)

    else:
        #otherwise, print a “doesn't match” message
        print('Your password "%s" does not match any password in our database' % (code))

# otherwise
else:
    # Concatenate a string together with the username embedded in the string (see example)
    print('"%s" does not match any username in our database,' % (username)),

    # Ask the user to enroll. Use the variable containing the concatenated string as prompt to raw_input()
    ask = raw_input('would you like to enroll?: ')

    # If the user wants to enroll:
    if ask == 'y':

        # convert the Users tuple into a list, append the username, then convert back to a tuple
        users = list(users)
        users.append(username)
        users = tuple(users)

        # convert the Passwords tuple into a list, append the password, then convert back to a tuple
        passwords = list(passwords)
        passwords.append(code)
        passwords = tuple(passwords)

        # In either case, print out the Users tuple and the Passwords tuple
        print(users)
        print(passwords)

    #otherwise
    else:
        print('\nGoodbye!!!')