A working skill estimating program is provided for estimating working skills of each agent in the state of separating a disturbance factor from response records. A plurality of selections including at least one game function are displayed to a player. The frame includes a recess that communicates with the channel and a hole that connects the recess to a frame exterior. A second current collector foil is juxtaposed against a side of the second electrode and is electrically coupled to the second terminal.