3. Given a point on the plane that does not coincide with the origin. How many different points can be obtained from it by sequentially applying symmetries relative to the $O y$ axis and the line $y=-x$ (in any order and any number of times)? If the point itself can also be obtained, it should be counted. If different points can have different answers, list them in any order separated by a semicolon.
Answer: $4 ; 8|8,4| 8 ; 4 \mid 4,8$.

## Examples of answer notation:

9

$9 ; 23$