A robust flexible logic unit is targeted to be primarily, but not exclusively, used as an embedded field programmable gate array. The body and head are configured to represent a characteristic identified with people or animals. The branch address bus functions as a lining or backing signal line to the real address bus, and a line resistance and line capacitance of the real address bus can be equivalently reduced. The covering lip and an extruded lip are accommodated in a recess of a corner garnish and clamped between a flange and the corner garnish, so that the molded rubber part is strongly fixed to the upper corner of the door sash. Movement distances, when the first and second shutters are moved simultaneously from the closing positions, of the first and second shutters from the closing positions to the opening positions are different from each other so that after one of said first and second shutters reaches the opening position, the other shutter is moved to the opening position.