Answer
The correct configuration for this structure is: "R"
Work Step by Step
1. Switch the positions between the number that is on the dash and the number 4:
2. Now that it is on a dash, ignore it, and identify if the numbers are increasing in clockwise or counterclockwise direction.
** Remember: Clockwise = "R", Counterclockwise = "S".
3. Since you have the configuration of the switched structure, you know that the original structure has the opposite configuration.