apneic paneic anpeic napeic pnaeic npaeic apenic paenic aepnic eapnic peanic epanic anepic naepic aenpic eanpic neapic enapic pneaic npeaic penaic epnaic nepaic enpaic apniec paniec anpiec napiec pnaiec npaiec apinec painec aipnec iapnec pianec ipanec anipec naipec ainpec ianpec niapec inapec pniaec npiaec pinaec ipnaec nipaec inpaec apeinc paeinc aepinc eapinc peainc epainc apienc paienc aipenc iapenc piaenc ipaenc aeipnc eaipnc aiepnc iaepnc eiapnc ieapnc peianc epianc pieanc ipeanc eipanc iepanc aneipc naeipc aenipc eanipc neaipc enaipc aniepc naiepc ainepc ianepc niaepc inaepc aeinpc eainpc aienpc iaenpc eianpc ieanpc neiapc eniapc nieapc ineapc einapc ienapc pneiac npeiac peniac epniac nepiac enpiac pnieac npieac pineac ipneac nipeac inpeac peinac epinac pienac ipenac eipnac iepnac neipac enipac niepac inepac einpac ienpac apneci paneci anpeci napeci pnaeci npaeci apenci paenci aepnci eapnci peanci epanci anepci naepci aenpci eanpci neapci enapci pneaci npeaci penaci epnaci nepaci enpaci apncei pancei anpcei napcei pnacei npacei apcnei pacnei acpnei capnei pcanei cpanei ancpei nacpei acnpei canpei ncapei cnapei pncaei npcaei pcnaei cpnaei ncpaei cnpaei apecni paecni aepcni eapcni peacni epacni apceni paceni acpeni capeni pcaeni cpaeni aecpni eacpni acepni caepni ecapni ceapni pecani epcani pceani cpeani ecpani cepani anecpi naecpi aencpi eancpi neacpi enacpi ancepi nacepi acnepi canepi ncaepi cnaepi aecnpi eacnpi acenpi caenpi ecanpi ceanpi necapi encapi nceapi cneapi ecnapi cenapi pnecai npecai pencai epncai nepcai enpcai pnceai npceai pcneai cpneai ncpeai cnpeai pecnai epcnai pcenai cpenai ecpnai cepnai necpai encpai ncepai cnepai ecnpai cenpai apnice panice anpice napice pnaice npaice apince paince aipnce iapnce piance ipance anipce naipce ainpce ianpce niapce inapce pniace npiace pinace ipnace nipace inpace apncie pancie anpcie napcie pnacie npacie apcnie pacnie acpnie capnie pcanie cpanie ancpie nacpie acnpie canpie ncapie cnapie pncaie npcaie pcnaie cpnaie ncpaie cnpaie apicne paicne aipcne iapcne piacne ipacne apcine pacine acpine capine pcaine cpaine aicpne iacpne acipne caipne icapne ciapne picane ipcane pciane cpiane icpane cipane anicpe naicpe aincpe iancpe niacpe inacpe ancipe nacipe acnipe canipe ncaipe cnaipe aicnpe iacnpe acinpe cainpe icanpe cianpe nicape incape nciape cniape icnape cinape pnicae npicae pincae ipncae nipcae inpcae pnciae npciae pcniae cpniae ncpiae cnpiae picnae ipcnae pcinae cpinae icpnae cipnae nicpae incpae ncipae cnipae icnpae cinpae apeicn paeicn aepicn eapicn peaicn epaicn apiecn paiecn aipecn iapecn piaecn ipaecn aeipcn eaipcn aiepcn iaepcn eiapcn ieapcn peiacn epiacn pieacn ipeacn eipacn iepacn apecin paecin aepcin eapcin peacin epacin apcein pacein acpein capein pcaein cpaein aecpin eacpin acepin caepin ecapin ceapin pecain epcain pceain cpeain ecpain cepain apicen paicen aipcen iapcen piacen ipacen apcien pacien acpien capien pcaien cpaien aicpen iacpen acipen caipen icapen ciapen picaen ipcaen pciaen cpiaen icpaen cipaen aeicpn eaicpn aiecpn iaecpn eiacpn ieacpn aecipn eacipn aceipn caeipn ecaipn ceaipn aicepn iacepn aciepn caiepn icaepn ciaepn eicapn iecapn eciapn ceiapn iceapn cieapn peican epican piecan ipecan eipcan iepcan pecian epcian pceian cpeian ecpian cepian picean ipcean pciean cpiean icpean cipean eicpan iecpan ecipan ceipan icepan ciepan aneicp naeicp aenicp eanicp neaicp enaicp aniecp naiecp ainecp ianecp niaecp inaecp aeincp eaincp aiencp iaencp eiancp ieancp neiacp eniacp nieacp ineacp einacp ienacp anecip naecip aencip eancip neacip enacip anceip naceip acneip caneip ncaeip cnaeip aecnip eacnip acenip caenip ecanip ceanip necaip encaip nceaip cneaip ecnaip cenaip anicep naicep aincep iancep niacep inacep anciep naciep acniep caniep ncaiep cnaiep aicnep iacnep acinep cainep icanep cianep nicaep incaep nciaep cniaep icnaep cinaep aeicnp eaicnp aiecnp iaecnp eiacnp ieacnp aecinp eacinp aceinp caeinp ecainp ceainp aicenp iacenp acienp caienp icaenp ciaenp eicanp iecanp ecianp ceianp iceanp cieanp neicap enicap niecap inecap eincap iencap neciap enciap nceiap cneiap ecniap ceniap niceap inceap ncieap cnieap icneap cineap eicnap iecnap ecinap ceinap icenap cienap pneica npeica penica epnica nepica enpica pnieca npieca pineca ipneca nipeca inpeca peinca epinca pienca ipenca eipnca iepnca neipca enipca niepca inepca einpca ienpca pnecia npecia pencia epncia nepcia enpcia pnceia npceia pcneia cpneia ncpeia cnpeia pecnia epcnia pcenia cpenia ecpnia cepnia necpia encpia ncepia cnepia ecnpia cenpia pnicea npicea pincea ipncea nipcea inpcea pnciea npciea pcniea cpniea ncpiea cnpiea picnea ipcnea pcinea cpinea icpnea cipnea nicpea incpea ncipea cnipea icnpea cinpea peicna epicna piecna ipecna eipcna iepcna pecina epcina pceina cpeina ecpina cepina picena ipcena pciena cpiena icpena cipena eicpna iecpna ecipna ceipna icepna ciepna neicpa enicpa niecpa inecpa eincpa iencpa necipa encipa nceipa cneipa ecnipa cenipa nicepa incepa nciepa cniepa icnepa cinepa eicnpa iecnpa ecinpa ceinpa icenpa cienpa
Note: these 'words' (valid or invalid) are all the permutations of the word apneic. These words are obtained by scrambling the letters in apneic.