facF16 := [-1.9317514492409*y+3.8634980194043*x-.25015492884870e-5*x^2-1.93174\
67740623*x^3+3.8634957125278*x^5+3.8635039496735*x^4-1.9317504895922*x^6+4.829\
3728337286*x^10-4.8293733464076*x^9-.96587681784659*x^8-1.9317473326792*x^7-1.\
9317505524593*x^11+4.8293707930421*x^12+2.8976194054997*x^15-.11307704782238e-\
5*x^14+1.9317498613258*x^17-1.9317482845360*x^13+3.8634988680421*x^18-1.931749\
8714141*x^16-2.8976212624535*x*y^5-3.8635065475261*y^5+3.8635047957867*y^7-3.8\
634986983657*y^8+.96587630510660*y^2+3.8634994158989*y^6+1.9317511065271*y^3+1\
.9317479203522*x^2*y^5+3.8635014132257*x^2*y^4-.96587541661203*x^2*y^3-.965876\
59550972*x^2*y^2+1.9317529790663*x^2*y+4.8293699489143*x*y^7-4.8293780681847*x
*y^6+2.8976314559633*x*y^4+3.8634999622771*x*y^3-.96587839781307*x*y^2-.965873\
37380541*x^3*y-4.8293802799979*x^7*y-3.8634960968791*x^6*y^2+3.8634991580420*x
^6*y+4.8293787398980*x^5*y^3+4.8293794993517*x^5*y^2-2.8976268954361*x^5*y+4.8\
293714953279*x^4*y^4-3.8635022307222*x^4*y^3-3.8635061744726*x^4*y^2-1.9317440\
960531*x^3*y^5-4.8293746836395*x^3*y^2-2.8976229258636*x^2*y^6+.96587419615075
*x*y-2.8976216819267*x^3*y^4+1.9317451878761*x^3*y^3-2.8976261010792*x^4*y-.96\
587475584908*y^4-3.8634969085126*y*x^10-4.8293775253943*y*x^9+.96587741273036*
y*x^8-4.8293694560173*y*x^11+4.8293736751587*y*x^12-.59841747475318e-6*y*x^14+
3.8635001127091*y*x^13-2.8976244637546*y^2*x^10+2.8976280970000*y^2*x^9+4.8293\
764370248*y^2*x^8+.96587477461820*y^2*x^7+1.9317471020411*y^2*x^11-3.863498694\
8784*y^2*x^12+1.9317490447577*y^2*x^13-.46555469123501e-5*y^3*x^6-1.9317548455\
869*y^3*x^10-2.8976272493263*y^3*x^9+3.8635018820270*y^3*x^8-2.8976195639515*y
^3*x^7-4.8293729643721*y^3*x^11+1.9317452339502*y^3*x^12-2.8976267443450*y^4*x
^5-3.8635030517008*y^4*x^6+.96587750595697*y^4*x^10+.96588137433162*y^4*x^9-3.\
8634971813102*y^4*x^8+1.9317471885657*y^4*x^7+.91268967743888e-6*y^4*x^11-.965\
87187861224*y^5*x^5+3.8635052447432*y^5*x^4-4.8293699711935*y^5*x^6+.\
25990492030354e-5*y^5*x^10-4.8293750392835*y^5*x^9+3.8635051930260*y^5*x^8-1.9\
317498904045*y^5*x^7+3.8635012753394*y^6*x^3+2.8976257776790*y^6*x^5-2.8976196\
814357*y^6*x^4+4.8293744865612*y^6*x^6-.96587844321821*y^6*x^9+2.8976278734920
*y^6*x^8-1.9317530107667*y^6*x^7-2.8976247329181*y^7*x^2-4.8293783709679*y^7*x
^3-4.8293725314495*y^7*x^5-3.8635065307595*y^7*x^4+3.8635009994385*y^7*x^6-4.8\
293731708218*y^7*x^8-1.9317440367665*y^7*x^7-.96587622416652*y^8*x^2-4.8293803\
152227*y^8*x^3+2.8976237629946*y^8*x-3.8635010591535*y^8*x^5+1.9317516004982*y
^8*x^4-1.9317474505903*y^8*x^6+.33152389496042e-5*y^8*x^7+.96587787041507*y^9*
x+3.8634970296988*y^9*x^2+2.8976213959597*y^9*x^3-3.8635027156228*y^9*x^5-2.89\
76265505049*y^9*x^4-.96587414891571*y^9*x^6-.96587357855616*y^10*x+4.829374382\
8107*y^10*x^2+3.8634986787527*y^10*x^3+1.9317485444907*y^10*x^5+2.897624577460\
2*y^10*x^4+.96587265119085*y^11*x^4+3.8634943331709*y^11*x-4.8293730956739*y^
11*x^3-2.8976253091163*y^11*x^2+4.8293718189976*y^12*x^3+2.8976254678621*y^12*
x^2+4.8293741000757*y^12*x-4.8293824766587*y^13*x^2+2.8976284811794*y^13*x-.96\
587374891994*y^14*x-.55734391950593e-6*y^9+4.8293717007531*y^10+4.829373871356\
7*y^11+2.8976231451203*y^12+.96587657341024*y^13+1.9317513686743*y^14-1.931751\
1460541*y^15+.96587316980930*x^2*y^14+.96587305658536*x^15*y^2-.96587572755702
*x^5*y^13+.96587502905031*x^12*y^5+.96587659515398*x^8*y^9+.96587401097739*x^
13*y^5+1.9317539726091*y^18-.15999640761139e-5*y^17+.40817174462527e-5*y^16-4.\
8293745265883*x*y^17-.37078524650131e-5*x^6*y^10-3.8634945292733*x*y^15-2.8976\
239514826*x^2*y^16+4.8293787511572*x^2*y^15+1.9317511747678*x^3*y^14+3.8634992\
310215*x^3*y^15+2.8976248425223*x^16*y^2-4.8293754247370*x^11*y^7-1.9317530475\
818*x^14*y^2-3.8635004320509*x^3*y^13+1.9317497842178*x^11*y^6-2.8976272924034
*x^11*y^5-1.9317553252382*x*y^16+2.8976243658064*x^8*y^10+1.9317520741299*x^10
*y^7-4.8293783672874*x^4*y^13-2.8976287350989*x^4*y^14+3.8634970465091*x^15*y^
3+1.9317525904646*x^12*y^6+3.8635005135213*x^5*y^11+4.8293725953091*x^12*y^4+3\
.8635037591880*x^5*y^12+4.8293819880885*x^10*y^6-4.8293733911874*x^14*y^4+1.93\
17504565264*x^15*y+3.8634939782960*x^13*y^4-4.8293687296649*x^13*y^3+4.8293737\
551259*x^16*y-2.8976245393195*x^17*y-3.8635016296982*x^6*y^12+2.8976257400159*
x^9*y^8-3.8635003037804*x^9*y^7+4.8293746745066*x^9*y^9+2.8976219003963*x^7*y^
11+4.8293728032798*x^7*y^9-1.9317504958047*x^7*y^10+3.8634994942029*x^14*y^3+.\
15006379475591e-5*x^8*y^8+.49953438586079e-5*x^4*y^12-.19242510223958e-6*y^8*x
^10+.26004191302534e-5*y^11*x^6-2.8976232562260, -.90036322515160e-6*y-5.17665\
19666641*x+1.0353312378864*x^2+4.1413218209333*x^3+1.0353304605661*x^5+5.17665\
86385092*x^4-1.0353286401455*x^6+1.0353300026195*x^10+2.0706622288305*x^9-2.07\
06572657973*x^8-3.1059872439002*x^7-4.1413165415145*x^11-5.1766517999367*x^12+
2.0706588981873*x^15+4.1413225661643*x^14-4.1413201292721*x^17-1.0353347248707
*x^13-1.0353328092930*x^18-1.0353243331783*x^16+3.1059897073019*x*y^5-2.070660\
1067914*y^5+5.1766519837918*y^7+1.0353317890816*y^8+1.0353285135654*y^2+5.1766\
552547035*y^6+2.0706568966219*y^3+2.0706652725135*x^2*y^5-1.0353298162325*x^2*
y^4-3.1059936017601*x^2*y^3+4.1413215605842*x^2*y^2-2.0706615336225*x^2*y-4.14\
13270051907*x*y^7+4.1413199287046*x*y^6+5.1766556431419*x*y^4+1.0353310594578*
x*y^3+2.0706575582486*x*y^2-4.1413210592944*x^3*y-1.0353230894470*x^7*y-5.1766\
500117200*x^6*y^2+1.0353334185137*x^6*y-3.1059923347786*x^5*y^3-3.105990821077\
4*x^5*y^2+2.0706614476617*x^5*y-4.1413218287103*x^4*y^4+2.0706610118913*x^4*y^
3+5.1766538207370*x^4*y^2-1.0353199508822*x^3*y^5+5.1766531856436*x^3*y^2+1.03\
53276292844*x^2*y^6+4.1413246808493*x*y-5.1766517635096*x^3*y^4+3.105990962708\
1*x^3*y^3+4.1413261805286*x^4*y-3.1059944670811*y^4-1.0353279747306*y*x^10+3.1\
059939559314*y*x^9+3.1059914669511*y*x^8-5.1766494237156*y*x^11+3.105988306108\
0*y*x^12-.76680087702833e-7*y*x^14-.31217533345623e-5*y*x^13+2.0706630750778*y
^2*x^10-5.1766534484680*y^2*x^9-2.0706603037605*y^2*x^8+.35469409649988e-5*y^2
*x^7+.18530284765120e-5*y^2*x^11+1.0353272538760*y^2*x^12-1.0353244056193*y^2*
x^13+4.1413221836740*y^3*x^6-3.1059985227244*y^3*x^10+1.0353324944489*y^3*x^9+
5.1766522931663*y^3*x^8-.36556383839474e-5*y^3*x^7+4.1413243415545*y^3*x^11-3.\
1059897765959*y^3*x^12-5.1766556193063*y^4*x^5+3.1059893595102*y^4*x^6-.\
15225388485335e-5*y^4*x^10-.24772881894715e-5*y^4*x^9+2.0706594126131*y^4*x^8+
1.0353246503887*y^4*x^7-.10043644534269e-4*y^4*x^11+2.0706610935264*y^5*x^5-4.\
1413165569365*y^5*x^4+2.0706549881703*y^5*x^6-4.1413249336991*y^5*x^10+2.07066\
29530349*y^5*x^9-2.0706644327232*y^5*x^8+5.1766537308845*y^5*x^7+5.17665100697\
33*y^6*x^3-4.1413231738237*y^6*x^5+3.1059926973512*y^6*x^4+2.0706678284622*y^6
*x^6-4.1413207684485*y^6*x^9-4.1413281385411*y^6*x^8-5.1766507987170*y^6*x^7+.\
42191417865308e-6*y^7*x^2-.12688568445375e-5*y^7*x^3-5.1766477335036*y^7*x^5+3\
.1059935411286*y^7*x^4-2.0706578144692*y^7*x^6-2.0706602361752*y^7*x^8+3.10599\
29609377*y^7*x^7-3.1059940439397*y^8*x^2-.32882154763743e-5*y^8*x^3-1.03532510\
60561*y^8*x+4.1413219781372*y^8*x^5+5.1766513827398*y^8*x^4+.20088401267937e-5
*y^8*x^6+4.1413211707233*y^8*x^7+3.1059884129271*y^9*x-.31419542294895e-6*y^9*
x^2-1.0353255162721*y^9*x^3+5.1766567506431*y^9*x^5+3.1059948458940*y^9*x^4+5.\
1766521419154*y^9*x^6-.22356961866332e-5*y^10*x+2.0706693637204*y^10*x^2-4.141\
3203998507*y^10*x^3-4.1413267497137*y^10*x^5+5.1766571701519*y^10*x^4+1.035326\
5307455*y^11*x^4-4.1413254829038*y^11*x+5.1766564322665*y^11*x^3+2.07065956021\
25*y^11*x^2+3.1059957602805*y^12*x^3+3.1059939883125*y^12*x^2-2.0706586907382*
y^12*x+4.1413231136892*y^13*x^2-3.1059834614939*y^13*x-3.1059892759851*y^14*x+
1.0353326839085*y^9+3.1059914594075*y^10+2.0706620251049*y^11+3.1059869442640*
y^12+4.1413220299948*y^13+.17125472781349e-5*y^14+3.1059904779094*y^15+2.07066\
20593774*x^2*y^14+5.1766474584396*x^15*y^2-2.0706646705333*x^5*y^13-4.14132549\
90724*x^12*y^5+2.0706589516193*x^8*y^9-.41756182062084e-5*x^13*y^5+2.070658679\
3906*y^18+5.1766497784432*y^17+2.0706653757531*y^16+4.1413251092163*x*y^17+1.0\
353288565440*x^6*y^10+3.1059928712490*x*y^15-3.1059922828740*x^2*y^16+4.141320\
7411392*x^2*y^15-4.1413203964184*x^3*y^14+.24036595023806e-6*x^3*y^15+3.105992\
1826017*x^16*y^2+3.1059913515903*x^11*y^7-4.1413233367096*x^14*y^2+5.176655845\
9926*x^3*y^13+1.0353307997212*x^11*y^6+3.1059991112759*x^11*y^5-4.141323947432\
4*x*y^16-5.1766559876143*x^8*y^10+5.1766526948762*x^10*y^7-4.1413195023536*x^4
*y^13-2.0706654778020*x^4*y^14-2.0706567204967*x^15*y^3+5.1766509756246*x^12*y
^6-3.1059902111457*x^5*y^11+4.1413201990860*x^12*y^4-1.0353285172656*x^5*y^12-\
2.0706555117147*x^10*y^6+2.0706614352979*x^14*y^4+3.1059934136580*x^15*y+2.070\
6619173088*x^13*y^4-3.1059900114877*x^13*y^3-4.1413238646411*x^16*y+5.17665455\
98306*x^17*y+4.1413194013840*x^6*y^12+2.0706644406824*x^9*y^8-5.1766579010935*
x^9*y^7+4.1413195885361*x^9*y^9+1.0353326348703*x^7*y^11-.23888661796274e-5*x^
7*y^9+4.1413202634668*x^7*y^10+1.0353340174134*x^14*y^3-4.1413203998198*x^8*y^
8+3.1059871814609*x^4*y^12+5.1766539887157-.21365817711844e-5*y^8*x^10-.\
30267772234961e-5*y^11*x^6];
t16n := 5945.926;
berror16 := .66508300103588e-6;