username = input('username: ')
print('Welcome', username)
print('Welcome ' + username)
print('Welcome %s' % username)

0435ca8414badafff3d56b374f053460f6a22b94
<mask token>

<mask token>
print('Welcome', username)
print('Welcome ' + username)
print('Welcome %s' % username)

username = input('username: ')
print('Welcome', username)
print('Welcome ' + username)
print('Welcome %s' % username)
