【Question 15】In the 6 circles below, fill in $1,2,3,4,5,6$, using each number only once, so that the sum of the three numbers on each side is equal, which is called the side magic sum of the triangle. The values that this triangle side magic sum can take are $\qquad$ _.
Exam Point: Magic Triangle
Analysis: The possible values for the magic sum of the triangle sides are $9,10,11,12$.