When a predetermined amount of credits have been inserted into a slot machine, the game mode is switched from the non-insurance mode to the insurance mode according to the player’s input operation via a touch panel. Once all the dependencies and the scheduling constraints of the plan are respected, the scheduler optimizes the order of the remaining jobs to be run, also considering the location of the data to be accessed. A third image processing portion again divides each line of image data into n blocks of image data, and performs third predetermined image processing on the image data using the respective synchronization signals, the period of each of which is the original period. A flexible retaining clip is adapted to move generally vertically toward and away from the occlusal plane within a clip slot formed through the bracket.