D*xy+*yDx*xDyD+xy+DxDyD-xy-DxDyDconstant0Dt1*2+2-20010constant0t0D112.2D*xy+*yDx*xDyD*xyc1DxDyD+xy+DxDyD+xyc2DxDyD-xy-DxDyD-xyc3DxDyDconstant0Dconstantc4Dt1Dtc5D*xyD+xyD-xyDconstantDtD*xy+*yDx*xDyD+xy+DxDyD-xy-DxDyDconstant0Dt111*221112+231112-271112001101D1011constant05t09D1031c1231112c2291112c3241112c4015c5012D*xyc1DxDyD-xyc3DxDyDtc5D*xyc1DxDyD+xyc2DxDyD-xyc3DxDyDconstantc4Dtc511*221112+201112-201112004102D1101constant01t00D1081c12101112c2201112c3201112c405c500Dconstantc4D*xyc1DxDyD+xyc2DxDyD-xyc3DxDyDconstantc4Dtc511*2121112+211112-201112001100D1141constant010t08D1021c12101112c2201112c3201112c400c504D+xyc2DxDyD*xyc1DxDyD+xyc2DxDyD-xyc3DxDyDconstantc4Dtc5TcT3.0.0