richen irchen rcihen crihen icrhen cirhen rihcen irhcen rhicen hricen ihrcen hircen rchien crhien rhcien hrcien chrien hcrien ichren cihren ihcren hicren chiren hciren ricehn ircehn rciehn criehn icrehn cirehn riechn irechn reichn erichn ierchn eirchn rceihn creihn recihn ercihn cerihn ecrihn icerhn cierhn iecrhn eicrhn ceirhn ecirhn rihecn irhecn rhiecn hriecn ihrecn hirecn riehcn irehcn reihcn erihcn ierhcn eirhcn rheicn hreicn rehicn erhicn hericn ehricn ihercn hiercn iehrcn eihrcn heircn ehircn rchein crhein rhcein hrcein chrein hcrein rcehin crehin rechin erchin cerhin ecrhin rhecin hrecin rehcin erhcin hercin ehrcin cherin hcerin cehrin echrin hecrin ehcrin ichern cihern ihcern hicern chiern hciern icehrn ciehrn iechrn eichrn ceihrn ecihrn ihecrn hiecrn iehcrn eihcrn heicrn ehicrn cheirn hceirn cehirn echirn hecirn ehcirn richne irchne rcihne crihne icrhne cirhne rihcne irhcne rhicne hricne ihrcne hircne rchine crhine rhcine hrcine chrine hcrine ichrne cihrne ihcrne hicrne chirne hcirne ricnhe ircnhe rcinhe crinhe icrnhe cirnhe rinche irnche rniche nriche inrche nirche rcnihe crnihe rncihe nrcihe cnrihe ncrihe icnrhe cinrhe incrhe nicrhe cnirhe ncirhe rihnce irhnce rhince hrince ihrnce hirnce rinhce irnhce rnihce nrihce inrhce nirhce rhnice hrnice rnhice nrhice hnrice nhrice ihnrce hinrce inhrce nihrce hnirce nhirce rchnie crhnie rhcnie hrcnie chrnie hcrnie rcnhie crnhie rnchie nrchie cnrhie ncrhie rhncie hrncie rnhcie nrhcie hnrcie nhrcie chnrie hcnrie cnhrie nchrie hncrie nhcrie ichnre cihnre ihcnre hicnre chinre hcinre icnhre cinhre inchre nichre cnihre ncihre ihncre hincre inhcre nihcre hnicre nhicre chnire hcnire cnhire nchire hncire nhcire ricenh ircenh rcienh crienh icrenh cirenh riecnh irecnh reicnh ericnh iercnh eircnh rceinh creinh recinh ercinh cerinh ecrinh icernh ciernh iecrnh eicrnh ceirnh ecirnh ricneh ircneh rcineh crineh icrneh cirneh rinceh irnceh rniceh nriceh inrceh nirceh rcnieh crnieh rncieh nrcieh cnrieh ncrieh icnreh cinreh increh nicreh cnireh ncireh riench irench reinch erinch iernch eirnch rinech irnech rniech nriech inrech nirech renich ernich rneich nreich enrich nerich ienrch einrch inerch nierch enirch neirch rcenih crenih recnih ercnih cernih ecrnih rcneih crneih rnceih nrceih cnreih ncreih rencih erncih rnecih nrecih enrcih nercih cenrih ecnrih cnerih ncerih encrih necrih icenrh cienrh iecnrh eicnrh ceinrh ecinrh icnerh cinerh incerh nicerh cnierh ncierh iencrh eincrh inecrh niecrh enicrh neicrh cenirh ecnirh cneirh nceirh encirh necirh rihenc irhenc rhienc hrienc ihrenc hirenc riehnc irehnc reihnc erihnc ierhnc eirhnc rheinc hreinc rehinc erhinc herinc ehrinc ihernc hiernc iehrnc eihrnc heirnc ehirnc rihnec irhnec rhinec hrinec ihrnec hirnec rinhec irnhec rnihec nrihec inrhec nirhec rhniec hrniec rnhiec nrhiec hnriec nhriec ihnrec hinrec inhrec nihrec hnirec nhirec rienhc irenhc reinhc erinhc iernhc eirnhc rinehc irnehc rniehc nriehc inrehc nirehc renihc ernihc rneihc nreihc enrihc nerihc ienrhc einrhc inerhc nierhc enirhc neirhc rhenic hrenic rehnic erhnic hernic ehrnic rhneic hrneic rnheic nrheic hnreic nhreic renhic ernhic rnehic nrehic enrhic nerhic henric ehnric hneric nheric enhric nehric ihenrc hienrc iehnrc eihnrc heinrc ehinrc ihnerc hinerc inherc niherc hnierc nhierc ienhrc einhrc inehrc niehrc enihrc neihrc henirc ehnirc hneirc nheirc enhirc nehirc rcheni crheni rhceni hrceni chreni hcreni rcehni crehni rechni erchni cerhni ecrhni rhecni hrecni rehcni erhcni hercni ehrcni cherni hcerni cehrni echrni hecrni ehcrni rchnei crhnei rhcnei hrcnei chrnei hcrnei rcnhei crnhei rnchei nrchei cnrhei ncrhei rhncei hrncei rnhcei nrhcei hnrcei nhrcei chnrei hcnrei cnhrei nchrei hncrei nhcrei rcenhi crenhi recnhi ercnhi cernhi ecrnhi rcnehi crnehi rncehi nrcehi cnrehi ncrehi renchi ernchi rnechi nrechi enrchi nerchi cenrhi ecnrhi cnerhi ncerhi encrhi necrhi rhenci hrenci rehnci erhnci hernci ehrnci rhneci hrneci rnheci nrheci hnreci nhreci renhci ernhci rnehci nrehci enrhci nerhci henrci ehnrci hnerci nherci enhrci nehrci chenri hcenri cehnri echnri hecnri ehcnri chneri hcneri cnheri ncheri hnceri nhceri cenhri ecnhri cnehri ncehri enchri nechri hencri ehncri hnecri nhecri enhcri nehcri ichenr cihenr ihcenr hicenr chienr hcienr icehnr ciehnr iechnr eichnr ceihnr ecihnr ihecnr hiecnr iehcnr eihcnr heicnr ehicnr cheinr hceinr cehinr echinr hecinr ehcinr ichner cihner ihcner hicner chiner hciner icnher cinher incher nicher cniher nciher ihncer hincer inhcer nihcer hnicer nhicer chnier hcnier cnhier nchier hncier nhcier icenhr cienhr iecnhr eicnhr ceinhr ecinhr icnehr cinehr incehr nicehr cniehr nciehr ienchr einchr inechr niechr enichr neichr cenihr ecnihr cneihr nceihr encihr necihr ihencr hiencr iehncr eihncr heincr ehincr ihnecr hinecr inhecr nihecr hniecr nhiecr ienhcr einhcr inehcr niehcr enihcr neihcr henicr ehnicr hneicr nheicr enhicr nehicr chenir hcenir cehnir echnir hecnir ehcnir chneir hcneir cnheir ncheir hnceir nhceir cenhir ecnhir cnehir ncehir enchir nechir hencir ehncir hnecir nhecir enhcir nehcir
Note: these 'words' (valid or invalid) are all the permutations of the word richen. These words are obtained by scrambling the letters in richen.