prods rpods pords oprds ropds orpds prdos rpdos pdros dpros rdpos drpos podrs opdrs pdors dpors odprs doprs rodps ordps rdops drops odrps dorps prosd rposd porsd oprsd ropsd orpsd prsod rpsod psrod sprod rspod srpod posrd opsrd psord spord osprd soprd rospd orspd rsopd sropd osrpd sorpd prdso rpdso pdrso dprso rdpso drpso prsdo rpsdo psrdo sprdo rspdo srpdo pdsro dpsro psdro spdro dspro sdpro rdspo drspo rsdpo srdpo dsrpo sdrpo podsr opdsr pdosr dposr odpsr dopsr posdr opsdr psodr spodr ospdr sopdr pdsor dpsor psdor spdor dspor sdpor odspr dospr osdpr sodpr dsopr sdopr rodsp ordsp rdosp drosp odrsp dorsp rosdp orsdp rsodp srodp osrdp sordp rdsop drsop rsdop srdop dsrop sdrop odsrp dosrp osdrp sodrp dsorp sdorp
Note: these 'words' (valid or invalid) are all the permutations of the word prods. These words are obtained by scrambling the letters in prods.