naping anping npaing pnaing apning paning naipng anipng niapng inapng ainpng ianpng npiang pniang nipang inpang pinang ipnang apinng painng aipnng iapnng pianng ipanng napnig anpnig npanig pnanig apnnig pannig nanpig annpig nnapig nnapig annpig nanpig npnaig pnnaig nnpaig nnpaig pnnaig npnaig apnnig pannig anpnig napnig pnanig npanig nainpg aninpg nianpg inanpg ainnpg iannpg nanipg annipg nnaipg nnaipg annipg nanipg ninapg innapg nniapg nniapg innapg ninapg ainnpg iannpg aninpg nainpg inanpg nianpg npinag pninag nipnag inpnag pinnag ipnnag npniag pnniag nnpiag nnpiag pnniag npniag ninpag innpag nnipag nnipag innpag ninpag pinnag ipnnag pninag npinag inpnag nipnag apinng painng aipnng iapnng pianng ipanng apning paning anping naping pnaing npaing ainpng ianpng anipng naipng inapng niapng pinang ipnang pniang npiang inpang nipang napign anpign npaign pnaign apnign panign naipgn anipgn niapgn inapgn ainpgn ianpgn npiagn pniagn nipagn inpagn pinagn ipnagn apingn paingn aipngn iapngn piangn ipangn napgin anpgin npagin pnagin apngin pangin nagpin angpin ngapin gnapin agnpin ganpin npgain pngain ngpain gnpain pgnain gpnain apgnin pagnin agpnin gapnin pganin gpanin naigpn anigpn niagpn inagpn aingpn iangpn nagipn angipn ngaipn gnaipn agnipn ganipn nigapn ingapn ngiapn gniapn ignapn ginapn aignpn iagnpn aginpn gainpn iganpn gianpn npigan pnigan nipgan inpgan pingan ipngan npgian pngian ngpian gnpian pgnian gpnian nigpan ingpan ngipan gnipan ignpan ginpan pignan ipgnan pginan gpinan igpnan gipnan apignn paignn aipgnn iapgnn piagnn ipagnn apginn paginn agpinn gapinn pgainn gpainn aigpnn iagpnn agipnn gaipnn igapnn giapnn pigann ipgann pgiann gpiann igpann gipann napngi anpngi npangi pnangi apnngi panngi nanpgi annpgi nnapgi nnapgi annpgi nanpgi npnagi pnnagi nnpagi nnpagi pnnagi npnagi apnngi panngi anpngi napngi pnangi npangi napgni anpgni npagni pnagni apngni pangni nagpni angpni ngapni gnapni agnpni ganpni npgani pngani ngpani gnpani pgnani gpnani apgnni pagnni agpnni gapnni pganni gpanni nangpi anngpi nnagpi nnagpi anngpi nangpi nagnpi angnpi nganpi gnanpi agnnpi gannpi nngapi nngapi ngnapi gnnapi ngnapi gnnapi angnpi nagnpi agnnpi gannpi nganpi gnanpi npngai pnngai nnpgai nnpgai pnngai npngai npgnai pngnai ngpnai gnpnai pgnnai gpnnai nngpai nngpai ngnpai gnnpai ngnpai gnnpai pngnai npgnai pgnnai gpnnai ngpnai gnpnai apngni pangni anpgni napgni pnagni npagni apgnni pagnni agpnni gapnni pganni gpanni angpni nagpni agnpni ganpni ngapni gnapni pngani npgani pgnani gpnani ngpani gnpani naingp aningp niangp inangp ainngp ianngp nanigp annigp nnaigp nnaigp annigp nanigp ninagp innagp nniagp nniagp innagp ninagp ainngp ianngp aningp naingp inangp niangp naignp anignp niagnp inagnp aingnp iangnp naginp anginp ngainp gnainp agninp ganinp niganp inganp ngianp gnianp ignanp ginanp aignnp iagnnp aginnp gainnp igannp giannp nangip anngip nnagip nnagip anngip nangip nagnip angnip nganip gnanip agnnip gannip nngaip nngaip ngnaip gnnaip ngnaip gnnaip angnip nagnip agnnip gannip nganip gnanip ningap inngap nnigap nnigap inngap ningap nignap ingnap nginap gninap ignnap ginnap nngiap nngiap ngniap gnniap ngniap gnniap ingnap nignap ignnap ginnap nginap gninap aingnp iangnp anignp naignp inagnp niagnp aignnp iagnnp aginnp gainnp igannp giannp anginp naginp agninp ganinp ngainp gnainp inganp niganp ignanp ginanp ngianp gnianp npinga pninga nipnga inpnga pinnga ipnnga npniga pnniga nnpiga nnpiga pnniga npniga ninpga innpga nnipga nnipga innpga ninpga pinnga ipnnga pninga npinga inpnga nipnga npigna pnigna nipgna inpgna pingna ipngna npgina pngina ngpina gnpina pgnina gpnina nigpna ingpna ngipna gnipna ignpna ginpna pignna ipgnna pginna gpinna igpnna gipnna npngia pnngia nnpgia nnpgia pnngia npngia npgnia pngnia ngpnia gnpnia pgnnia gpnnia nngpia nngpia ngnpia gnnpia ngnpia gnnpia pngnia npgnia pgnnia gpnnia ngpnia gnpnia ningpa inngpa nnigpa nnigpa inngpa ningpa nignpa ingnpa nginpa gninpa ignnpa ginnpa nngipa nngipa ngnipa gnnipa ngnipa gnnipa ingnpa nignpa ignnpa ginnpa nginpa gninpa pingna ipngna pnigna npigna inpgna nipgna pignna ipgnna pginna gpinna igpnna gipnna pngina npgina pgnina gpnina ngpina gnpina ingpna nigpna ignpna ginpna ngipna gnipna apingn paingn aipngn iapngn piangn ipangn apnign panign anpign napign pnaign npaign ainpgn ianpgn anipgn naipgn inapgn niapgn pinagn ipnagn pniagn npiagn inpagn nipagn apignn paignn aipgnn iapgnn piagnn ipagnn apginn paginn agpinn gapinn pgainn gpainn aigpnn iagpnn agipnn gaipnn igapnn giapnn pigann ipgann pgiann gpiann igpann gipann apngin pangin anpgin napgin pnagin npagin apgnin pagnin agpnin gapnin pganin gpanin angpin nagpin agnpin ganpin ngapin gnapin pngain npgain pgnain gpnain ngpain gnpain aingpn iangpn anigpn naigpn inagpn niagpn aignpn iagnpn aginpn gainpn iganpn gianpn angipn nagipn agnipn ganipn ngaipn gnaipn ingapn nigapn ignapn ginapn ngiapn gniapn pingan ipngan pnigan npigan inpgan nipgan pignan ipgnan pginan gpinan igpnan gipnan pngian npgian pgnian gpnian ngpian gnpian ingpan nigpan ignpan ginpan ngipan gnipan
Note: these 'words' (valid or invalid) are all the permutations of the word naping. These words are obtained by scrambling the letters in naping.