string = "hello"
string = iter(string)
print(next(string))

03b778ac6fe6c81a6aa965fd802e128ed495b6c2
<mask token>

<mask token>
print(next(string))

string = 'hello'
string = iter(string)
print(next(string))

string = "hello"
string = iter(string)
print(next(string))
