There is a mistake in this code pl. Find query and send it?

Question

https://code.sololearn.com/WH2zRDXFHP1C/?ref=app

Answer 1

You can see the corrected style
https://code.sololearn.com/W7TFAI8gulOJ/?ref=app

Answer 2

It's line 46 => "document."

Answer 3

In style there is a mistake please.

Answer 4

Thanks

Answer 5

Hmm