Input (grade 10): In its simplest form, the object of the game is to score or "counts" by 'one's own off both the opponent's cue ball and the on a single shot.
Output (grade 12): In its simplest form, the object of carom billiards games is to score points or "counts" by bouncing one's own ball, called a cue ball, off of the other two balls on the table.