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