5. In the lottery box of Green Green Park, there are golden, silver, and colorful balls. The lottery participant can randomly draw 3 balls from the lottery box. Xiao Yangyang hopes to get 3 golden balls, Mei Yangyang hopes to get 2 golden balls and 1 silver ball, and Lan Yangyang hopes to get one of each kind of ball. Village Chief Man Yangyang says: “Only one of you three can be chosen to draw the lottery, no matter who is chosen, the probability of achieving your wish is the same.” There are at least $\qquad$ balls in the lottery box.
$8$