Diffie–Hellman key exchange

With two collaborators where one is called Alice and the another one called Bob, they established the diffie-hellman key exchange. My work here is to be a eavesdropper and I need to get the k value that is called secret key, to see more info you can check out here.

Let's see the information that I take:

P = 17
G = 11

from Alice X = 4
from Bob Y = 10

The method that I did is by brutal force:

And We got the value of k is 4.