Solving 2D map task via complex numbers, my decision fails 1 secret test, and I can't understand why?

Question

https://code.sololearn.com/c9gTQbKcvz21/?ref=app

Answer 1

a = "XXXXP,XXXXX,XXXXX,XXXPX,XXXXX"
should print 4, but this code prints 2.

Answer 2

I corrected code, now works, thanks

Answer 3

You are welcome!

Answer 4

I forgot abs()

Answer 5

Thank You Brian ! Seemed I understand the reason.