Bug Report for python-default-dict

[Hemantmi]

Bug Report for https://neetcode.io/problems/python-default-dict

Please describe the bug below and include any steps to reproduce the bug or screenshots if possible.

The bug is in the second part of the problem for which the link is below:

https://neetcode.io/problems/python-default-dict/question

The output of the second problem should be:
{1: [2, 3], 4: [5, 6], 1: [2]}