machi amchi mcahi cmahi acmhi camhi mahci amhci mhaci hmaci ahmci hamci mchai cmhai mhcai hmcai chmai hcmai achmi cahmi ahcmi hacmi chami hcami macih amcih mcaih cmaih acmih camih maich amich miach imach aimch iamch mciah cmiah micah imcah cimah icmah acimh caimh aicmh iacmh ciamh icamh mahic amhic mhaic hmaic ahmic hamic maihc amihc miahc imahc aimhc iamhc mhiac hmiac mihac imhac himac ihmac ahimc haimc aihmc iahmc hiamc ihamc mchia cmhia mhcia hmcia chmia hcmia mciha cmiha micha imcha cimha icmha mhica hmica mihca imhca himca ihmca chima hcima cihma ichma hicma ihcma achim cahim ahcim hacim chaim hcaim acihm caihm aichm iachm ciahm icahm ahicm haicm aihcm iahcm hiacm ihacm chiam hciam ciham icham hicam ihcam
Note: these 'words' (valid or invalid) are all the permutations of the word machi. These words are obtained by scrambling the letters in machi.