minusx0xminussxsyminusxyquot0sy0quotsxsysquotminusxysyplus0yyplussxysplusxyminusminusxyzminusxplusyzminussxsyminusxyquotsxsyminusxyquotsxsyquotminusxysyplussxyplusxyminusminusxyzplusyzminusminusxyzminusxplusyztruequotsxsyquotminusxysytrue1quot2131222plus2121121quot2121024s1114minus211022002quotsxsyminusxyfalseminussxsyminusxyminusminusxyzminusxplusyztrue1minus2121026plus211420quot201229s1110minus241023000minussxsyminusxy1minus281020plus241221quot211020s1112minus2110200010minusminusxyzplusyzfalseplussxyplusxytrue1plus211020plus241222quot211028s1111minus211020000