A metal tube slitter is presented. Each phase of the press-your-luck challenge comprises dealing an active subset of game items from a set of game items. Between the control pilot line and the ground line of the output side of the output circuit, a communication unit is connected via a transformer. A first current source configured to provide a first bias current to the control terminal of the first transistor. The conveying element comprises an upper screw conveyor that is located above the lower screw conveyor. The entropy coder codes the signal generated based on the selected prediction mode by a second entropy coding method having efficiency higher than that of the first entropy coding method.