profs rpofs porfs oprfs ropfs orpfs prfos rpfos pfros fpros rfpos frpos pofrs opfrs pfors fpors ofprs foprs rofps orfps rfops frops ofrps forps prosf rposf porsf oprsf ropsf orpsf prsof rpsof psrof sprof rspof srpof posrf opsrf psorf sporf osprf soprf rospf orspf rsopf sropf osrpf sorpf prfso rpfso pfrso fprso rfpso frpso prsfo rpsfo psrfo sprfo rspfo srpfo pfsro fpsro psfro spfro fspro sfpro rfspo frspo rsfpo srfpo fsrpo sfrpo pofsr opfsr pfosr fposr ofpsr fopsr posfr opsfr psofr spofr ospfr sopfr pfsor fpsor psfor spfor fspor sfpor ofspr fospr osfpr sofpr fsopr sfopr rofsp orfsp rfosp frosp ofrsp forsp rosfp orsfp rsofp srofp osrfp sorfp rfsop frsop rsfop srfop fsrop sfrop ofsrp fosrp osfrp sofrp fsorp sforp
Note: these 'words' (valid or invalid) are all the permutations of the word profs. These words are obtained by scrambling the letters in profs.