sired isred sried rsied irsed rised sierd iserd seird esird iesrd eisrd sreid rseid serid esrid resid ersid iresd riesd iersd eirsd reisd erisd sirde isrde sride rside irsde risde sidre isdre sdire dsire idsre disre srdie rsdie sdrie dsrie rdsie drsie irdse ridse idrse dirse rdise drise siedr isedr seidr esidr iesdr eisdr sider isder sdier dsier idser diser sedir esdir sdeir dseir edsir desir iedsr eidsr idesr diesr edisr deisr sredi rsedi serdi esrdi resdi ersdi srdei rsdei sdrei dsrei rdsei drsei sedri esdri sderi dseri edsri desri redsi erdsi rdesi dresi edrsi dersi ireds rieds ierds eirds reids erids irdes rides idres dires rdies dries iedrs eidrs iders diers edirs deirs redis erdis rdeis dreis edris deris
Note: these 'words' (valid or invalid) are all the permutations of the word sired. These words are obtained by scrambling the letters in sired.