hgecu ghecu hegcu ehgcu gehcu eghcu hgceu ghceu hcgeu chgeu gcheu cgheu hecgu ehcgu hcegu chegu echgu cehgu gechu egchu gcehu cgehu ecghu ceghu hgeuc gheuc heguc ehguc gehuc eghuc hguec ghuec hugec uhgec guhec ughec heugc ehugc huegc uhegc euhgc uehgc geuhc eguhc guehc ugehc eughc ueghc hgcue ghcue hcgue chgue gchue cghue hguce ghuce hugce uhgce guhce ughce hcuge chuge hucge uhcge cuhge uchge gcuhe cguhe guche ugche cughe ucghe hecug ehcug hceug cheug echug cehug heucg ehucg huecg uhecg euhcg uehcg hcueg chueg huceg uhceg cuheg ucheg ecuhg ceuhg euchg uechg cuehg ucehg gecuh egcuh gceuh cgeuh ecguh ceguh geuch eguch guech ugech eugch uegch gcueh cgueh guceh ugceh cugeh ucgeh ecugh ceugh eucgh uecgh cuegh ucegh
Note: these 'words' (valid or invalid) are all the permutations of the word hgecu. These words are obtained by scrambling the letters in hgecu.