3. Is it possible to arrange balls of eight colors in five boxes standing in a circle so that each box contains three balls of different colors, and no two balls of the same color are in adjacent boxes?
Answer: possible.
Instructions. Among 15 balls distributed in boxes, there cannot be three balls of the same color, since balls of the same color do not lie next to each other, and no fewer than six boxes are required. Therefore, we have seven colors of balls, two of each, and one ball of an eighth color. For convenience, we will number the colors from 1 to 8.

$-1,3,5-2,4,6-1,5,7-2,3,8-4,6,7$ -

Criteria. Answer without an example: 0 points.