1. An apparatus comprising: at least one processor; a speed calculation unit configured to calculate a movement speed of a plurality of operating members based on input data corresponding to input operations of the operating members using the at least one processor; a manipulation input analysis unit configured to analyze the input data based on the movement speed using the at least one processor; an execution unit configured to generate a command for executing a process according to the analyzed input data using the at least one processor; and a grouping processing unit configured to classify the plurality of operating members into groups based on the input data using the at least one processor, wherein the grouping processing unit is configured to define a reference vector corresponding to an operating member having a highest movement speed from among the plurality of operating members.