chays hcays cahys achys hacys ahcys chyas hcyas cyhas ychas hycas yhcas cayhs acyhs cyahs ycahs aychs yachs haycs ahycs hyacs yhacs ayhcs yahcs chasy hcasy cahsy achsy hacsy ahcsy chsay hcsay cshay schay hscay shcay cashy acshy csahy scahy aschy sachy hascy ahscy hsacy shacy ashcy sahcy chysa hcysa cyhsa ychsa hycsa yhcsa chsya hcsya cshya schya hscya shcya cysha ycsha csyha scyha yscha sycha hysca yhsca hsyca shyca yshca syhca caysh acysh cyash ycash aycsh yacsh casyh acsyh csayh scayh ascyh sacyh cysah ycsah csyah scyah yscah sycah aysch yasch asych saych ysach syach haysc ahysc hyasc yhasc ayhsc yahsc hasyc ahsyc hsayc shayc ashyc sahyc hysac yhsac hsyac shyac yshac syhac ayshc yashc asyhc sayhc ysahc syahc
Note: these 'words' (valid or invalid) are all the permutations of the word chays. These words are obtained by scrambling the letters in chays.