What is the correct electron dot notation of carbon?

My book says that the dot notation for Lewis structure of carbon has 2 possible ways:


1. two dots on the right, one on the top, one on the left
2. one dot on all four sides


Why are both of these correct? Isn't only the first one correct by Hund's rule? By the way, we are now learning Lewis structures and the book randomly used the 2nd dot notation of carbon.


