you are right the creator did not said they will be no # at the start but this will lead to another problem which is to search for any # in the words and delete them !

The core part of this solution is creating the translation table. I am creating a one-to-one mapping between a character and its rotated character in the line string.maketrans(first, trance). So, after this A is mapped to N, B to O, etc.

After this, I am just translating the message based on above created translation table.

what does this code do exacly i dont understand it

lol i started writing code and solve it.. then i see this XD