A can kicking game which includes a substantially rectangular playing surface, a goal area having a goal housing subdivided into a plurality of spaces and open to the playing surface, a random chance generator, a can positionable on the playing surface, a plurality of instruction cards providing instructions to players on a turn-by-turn basis. Portions near the ends of the wear rail are designed to have hardness smaller than that of a center portion of the wear rail. The program product can define optimal process conditions and an optimal driving force distribution in heat recovery systems, and can produce an optimal Pareto-curve that shows the rigorous trade off between energy cost and capital cost for any energy recovery system. A workload level can be based on user defined parameters or a measurement of the value of one or more workload characteristics. The semiconductor package includes a package substrate, a semiconductor chip mounted on the upper surface of the semiconductor substrate, and a board providing a region mounted with the package substrate and being mounted with a plurality of mounting elements which are vertically aligned with the plurality of grooves and are inserted into the plurality of grooves. The sidewalls of the second bubbling chamber contract in the direction toward the discharge port at an inclination of 10 to 45\xb0.