fiars ifars fairs afirs iafrs aifrs firas ifras frias rfias irfas rifas faris afris frais rfais arfis rafis iarfs airfs irafs riafs arifs raifs fiasr ifasr faisr afisr iafsr aifsr fisar ifsar fsiar sfiar isfar sifar fasir afsir fsair sfair asfir safir iasfr aisfr isafr siafr asifr saifr firsa ifrsa frisa rfisa irfsa rifsa fisra ifsra fsira sfira isfra sifra frsia rfsia fsria sfria rsfia srfia irsfa risfa isrfa sirfa rsifa srifa farsi afrsi frasi rfasi arfsi rafsi fasri afsri fsari sfari asfri safri frsai rfsai fsrai sfrai rsfai srfai arsfi rasfi asrfi sarfi rsafi srafi iarsf airsf irasf riasf arisf raisf iasrf aisrf isarf siarf asirf sairf irsaf risaf israf siraf rsiaf sriaf arsif rasif asrif sarif rsaif sraif
Note: these 'words' (valid or invalid) are all the permutations of the word fiars. These words are obtained by scrambling the letters in fiars.