A ballet technique shoe has a forefoot piece and a heel piece connected by an elastic gusset, and has an elastic drawstring sleeve around the opening of the shoe which contains an elastic drawstring. The probe card includes test probes comprising cantilever elements configured and arranged with probe tips in a pattern corresponding to an array of bond pads of semiconductor dice residing on a device wafer. When the user inputs an editing signal and the editing signal corresponds to an association instruction, the window is associated with the association instruction. The ink supply system has a flow resistance r satisfying the following relationship:. A primary air circuit of the charge forming device delivers a substantially lean mixture of fuel-and-air into the crankcase at high engine speeds where it flows from the crankcase through an air feed passage and into the combustion chamber.