crons rcons corns ocrns rocns orcns crnos rcnos cnros ncros rncos nrcos conrs ocnrs cnors ncors oncrs nocrs roncs orncs rnocs nrocs onrcs norcs crosn rcosn corsn ocrsn rocsn orcsn crson rcson csron scron rscon srcon cosrn ocsrn csorn scorn oscrn socrn roscn orscn rsocn srocn osrcn sorcn crnso rcnso cnrso ncrso rncso nrcso crsno rcsno csrno scrno rscno srcno cnsro ncsro csnro scnro nscro sncro rnsco nrsco rsnco srnco nsrco snrco consr ocnsr cnosr ncosr oncsr nocsr cosnr ocsnr csonr sconr oscnr socnr cnsor ncsor csnor scnor nscor sncor onscr noscr osncr soncr nsocr snocr ronsc ornsc rnosc nrosc onrsc norsc rosnc orsnc rsonc sronc osrnc sornc rnsoc nrsoc rsnoc srnoc nsroc snroc onsrc nosrc osnrc sonrc nsorc snorc
Note: these 'words' (valid or invalid) are all the permutations of the word crons. These words are obtained by scrambling the letters in crons.