#!/usr/bin/python3.6

username = input("Your username: ")
print ("Hello, " + username + "!")

e63b6b10b534aaabc689638f390c05dafc2063e2
<mask token>

<mask token>
print('Hello, ' + username + '!')

username = input('Your username: ')
print('Hello, ' + username + '!')

#!/usr/bin/python3.6

username = input("Your username: ")
print ("Hello, " + username + "!")
