How could this pass the test while my first try failed?
This should report an error with empty input of s2,
when you try scramble('r',''), this code return True while it should be False.

Thank you for your kindly reminding and reply. I figured it out eventually and passed the test.

I copy the code to my computer and works well:
My code test:
solution("apples, pears # and bananas\ngrapes\nbananas !apples",['#','!'])
'apples, pears\ngrapes\nbananas'

However, failed in here with the exactly same input arguments, which reported:
'apples, pears\ngrapes\nbananas !' should be 'apples, pears\ngrapes\nbananas'

Apparently, there exists an error caused this. Please check!