username = ''

while username != 'pypy':
    username = input("Please enter your username:")
    
997560f0d80aa601c93d7e3d6bbd417f7104ceaf
<mask token>

<mask token>
while username != 'pypy':
    username = input('Please enter your username:')

username = ''
while username != 'pypy':
    username = input('Please enter your username:')

username = ''

while username != 'pypy':
    username = input("Please enter your username:")
    