marsh amrsh mrash rmash armsh ramsh masrh amsrh msarh smarh asmrh samrh mrsah rmsah msrah smrah rsmah srmah arsmh rasmh asrmh sarmh rsamh sramh marhs amrhs mrahs rmahs armhs ramhs mahrs amhrs mhars hmars ahmrs hamrs mrhas rmhas mhras hmras rhmas hrmas arhms rahms ahrms harms rhams hrams mashr amshr msahr smahr asmhr samhr mahsr amhsr mhasr hmasr ahmsr hamsr mshar smhar mhsar hmsar shmar hsmar ashmr sahmr ahsmr hasmr shamr hsamr mrsha rmsha msrha smrha rsmha srmha mrhsa rmhsa mhrsa hmrsa rhmsa hrmsa mshra smhra mhsra hmsra shmra hsmra rshma srhma rhsma hrsma shrma hsrma arshm rashm asrhm sarhm rsahm srahm arhsm rahsm ahrsm harsm rhasm hrasm ashrm sahrm ahsrm hasrm sharm hsarm rsham srham rhsam hrsam shram hsram
Note: these 'words' (valid or invalid) are all the permutations of the word marsh. These words are obtained by scrambling the letters in marsh.