Day_04 Explaining character skipping in Python string slicing via [0:6:2]

Right now:

<img width="625" height="146" alt="Image" src="https://github.com/user-attachments/assets/9983a1eb-2142-4add-b9cf-4321a212dc71" />

There is no explanation about the [0,6,2], I would like to add to this the explanation as my contribution