print('---------------------')
print('security check')
print('---------------------')
print('')
user = input('Who is this?')
if user == 'King Arthur':
    realpassword = 'Arthur is a donkey'
    chock = 0
    while chock == 0:
        password = input('Enter password: ')
        if password == realpassword:
            chock = 1
            print('Welcome, King Arthur!')
        else:
            chock = 0
            print('Sorry, but your password is incorrect')
else:
    print('Sorry, but your username is not recognised')