reiks eriks rieks ireks eirks ierks rekis erkis rkeis kreis ekris keris rikes irkes rkies kries ikres kires eikrs iekrs ekirs keirs ikers kiers reisk erisk riesk iresk eirsk iersk resik ersik rseik sreik esrik serik risek irsek rsiek sriek isrek sirek eisrk iesrk esirk seirk iserk sierk reksi erksi rkesi kresi ekrsi kersi reski erski rseki sreki esrki serki rksei krsei rskei srkei ksrei skrei eksri kesri eskri sekri kseri skeri rikse irkse rkise krise ikrse kirse riske irske rsike srike isrke sirke rksie krsie rskie srkie ksrie skrie iksre kisre iskre sikre ksire skire eiksr ieksr ekisr keisr ikesr kiesr eiskr ieskr esikr seikr isekr siekr eksir kesir eskir sekir kseir skeir ikser kiser isker siker ksier skier
Note: these 'words' (valid or invalid) are all the permutations of the word reiks. These words are obtained by scrambling the letters in reiks.