16. (5 points)
The following is a part of a Chinese chessboard, with a knight located at point $A$. According to the rules, the knight moves in an "L" shape, for example: from point $A$ to point $B$ it takes a minimum of 1 step, from point $A$ to point $C$ it takes a minimum of 2 steps. So, from point $A$ to point $Q$ it takes a minimum of steps. $\qquad$
$5$