sechs eschs scehs csehs ecshs ceshs sehcs eshcs shecs hsecs ehscs hescs sches cshes shces hsces chses hcses echss cehss ehcss hecss chess hcess secsh escsh scesh csesh ecssh cessh sesch essch ssech ssech essch sesch scseh csseh ssceh ssceh csseh scseh ecssh cessh escsh secsh csesh scesh sehsc eshsc shesc hsesc ehssc hessc seshc esshc ssehc ssehc esshc seshc shsec hssec sshec sshec hssec shsec ehssc hessc eshsc sehsc hsesc shesc schse cshse shcse hscse chsse hcsse scshe csshe ssche ssche csshe scshe shsce hssce sshce sshce hssce shsce chsse hcsse cshse schse hscse shcse echss cehss ehcss hecss chess hcess ecshs ceshs eschs sechs csehs scehs ehscs hescs eshcs sehcs hsecs shecs chses hcses cshes sches hsces shces
Note: these 'words' (valid or invalid) are all the permutations of the word sechs. These words are obtained by scrambling the letters in sechs.