ferric efrric freric rferic erfric refric ferric efrric freric rferic erfric refric frreic rfreic frreic rfreic rrfeic rrfeic errfic rerfic errfic rerfic rrefic rrefic ferirc efrirc freirc rfeirc erfirc refirc feirrc efirrc fierrc iferrc eifrrc iefrrc frierc rfierc firerc ifrerc riferc irferc erifrc reifrc eirfrc ierfrc riefrc irefrc ferirc efrirc freirc rfeirc erfirc refirc feirrc efirrc fierrc iferrc eifrrc iefrrc frierc rfierc firerc ifrerc riferc irferc erifrc reifrc eirfrc ierfrc riefrc irefrc frriec rfriec frriec rfriec rrfiec rrfiec frirec rfirec firrec ifrrec rifrec irfrec frirec rfirec firrec ifrrec rifrec irfrec rrifec rrifec rirfec irrfec rirfec irrfec errifc rerifc errifc rerifc rreifc rreifc erirfc reirfc eirrfc ierrfc rierfc irerfc erirfc reirfc eirrfc ierrfc rierfc irerfc rriefc rriefc rirefc irrefc rirefc irrefc ferrci efrrci frerci rferci erfrci refrci ferrci efrrci frerci rferci erfrci refrci frreci rfreci frreci rfreci rrfeci rrfeci errfci rerfci errfci rerfci rrefci rrefci fercri efrcri frecri rfecri erfcri refcri fecrri efcrri fcerri cferri ecfrri cefrri frceri rfceri fcreri cfreri rcferi crferi ercfri recfri ecrfri cerfri rcefri crefri fercri efrcri frecri rfecri erfcri refcri fecrri efcrri fcerri cferri ecfrri cefrri frceri rfceri fcreri cfreri rcferi crferi ercfri recfri ecrfri cerfri rcefri crefri frrcei rfrcei frrcei rfrcei rrfcei rrfcei frcrei rfcrei fcrrei cfrrei rcfrei crfrei frcrei rfcrei fcrrei cfrrei rcfrei crfrei rrcfei rrcfei rcrfei crrfei rcrfei crrfei errcfi rercfi errcfi rercfi rrecfi rrecfi ercrfi recrfi ecrrfi cerrfi rcerfi crerfi ercrfi recrfi ecrrfi cerrfi rcerfi crerfi rrcefi rrcefi rcrefi crrefi rcrefi crrefi fericr efricr freicr rfeicr erficr reficr feircr efircr fiercr ifercr eifrcr iefrcr friecr rfiecr firecr ifrecr rifecr irfecr erifcr reifcr eirfcr ierfcr riefcr irefcr fercir efrcir frecir rfecir erfcir refcir fecrir efcrir fcerir cferir ecfrir cefrir frceir rfceir fcreir cfreir rcfeir crfeir ercfir recfir ecrfir cerfir rcefir crefir feicrr eficrr fiecrr ifecrr eifcrr iefcrr fecirr efcirr fceirr cfeirr ecfirr cefirr ficerr ifcerr fcierr cfierr icferr ciferr eicfrr iecfrr ecifrr ceifrr icefrr ciefrr fricer rficer fircer ifrcer rifcer irfcer frcier rfcier fcrier cfrier rcfier crfier ficrer ifcrer fcirer cfirer icfrer cifrer ricfer ircfer rcifer crifer icrfer cirfer ericfr reicfr eircfr iercfr riecfr irecfr ercifr recifr ecrifr cerifr rceifr creifr eicrfr iecrfr ecirfr ceirfr icerfr cierfr ricefr ircefr rciefr criefr icrefr cirefr fericr efricr freicr rfeicr erficr reficr feircr efircr fiercr ifercr eifrcr iefrcr friecr rfiecr firecr ifrecr rifecr irfecr erifcr reifcr eirfcr ierfcr riefcr irefcr fercir efrcir frecir rfecir erfcir refcir fecrir efcrir fcerir cferir ecfrir cefrir frceir rfceir fcreir cfreir rcfeir crfeir ercfir recfir ecrfir cerfir rcefir crefir feicrr eficrr fiecrr ifecrr eifcrr iefcrr fecirr efcirr fceirr cfeirr ecfirr cefirr ficerr ifcerr fcierr cfierr icferr ciferr eicfrr iecfrr ecifrr ceifrr icefrr ciefrr fricer rficer fircer ifrcer rifcer irfcer frcier rfcier fcrier cfrier rcfier crfier ficrer ifcrer fcirer cfirer icfrer cifrer ricfer ircfer rcifer crifer icrfer cirfer ericfr reicfr eircfr iercfr riecfr irecfr ercifr recifr ecrifr cerifr rceifr creifr eicrfr iecrfr ecirfr ceirfr icerfr cierfr ricefr ircefr rciefr criefr icrefr cirefr frrice rfrice frrice rfrice rrfice rrfice frirce rfirce firrce ifrrce rifrce irfrce frirce rfirce firrce ifrrce rifrce irfrce rrifce rrifce rirfce irrfce rirfce irrfce frrcie rfrcie frrcie rfrcie rrfcie rrfcie frcrie rfcrie fcrrie cfrrie rcfrie crfrie frcrie rfcrie fcrrie cfrrie rcfrie crfrie rrcfie rrcfie rcrfie crrfie rcrfie crrfie fricre rficre fircre ifrcre rifcre irfcre frcire rfcire fcrire cfrire rcfire crfire ficrre ifcrre fcirre cfirre icfrre cifrre ricfre ircfre rcifre crifre icrfre cirfre fricre rficre fircre ifrcre rifcre irfcre frcire rfcire fcrire cfrire rcfire crfire ficrre ifcrre fcirre cfirre icfrre cifrre ricfre ircfre rcifre crifre icrfre cirfre rricfe rricfe rircfe irrcfe rircfe irrcfe rrcife rrcife rcrife crrife rcrife crrife ricrfe ircrfe rcirfe crirfe icrrfe cirrfe ricrfe ircrfe rcirfe crirfe icrrfe cirrfe erricf rericf erricf rericf rreicf rreicf erircf reircf eirrcf ierrcf riercf irercf erircf reircf eirrcf ierrcf riercf irercf rriecf rriecf rirecf irrecf rirecf irrecf errcif rercif errcif rercif rrecif rrecif ercrif recrif ecrrif cerrif rcerif crerif ercrif recrif ecrrif cerrif rcerif crerif rrceif rrceif rcreif crreif rcreif crreif ericrf reicrf eircrf iercrf riecrf irecrf ercirf recirf ecrirf cerirf rceirf creirf eicrrf iecrrf ecirrf ceirrf icerrf cierrf ricerf ircerf rcierf crierf icrerf cirerf ericrf reicrf eircrf iercrf riecrf irecrf ercirf recirf ecrirf cerirf rceirf creirf eicrrf iecrrf ecirrf ceirrf icerrf cierrf ricerf ircerf rcierf crierf icrerf cirerf rricef rricef rircef irrcef rircef irrcef rrcief rrcief rcrief crrief rcrief crrief ricref ircref rciref criref icrref cirref ricref ircref rciref criref icrref cirref
Note: these 'words' (valid or invalid) are all the permutations of the word ferric. These words are obtained by scrambling the letters in ferric.