nucha uncha ncuha cnuha ucnha cunha nuhca unhca nhuca hnuca uhnca hunca nchua cnhua nhcua hncua chnua hcnua uchna cuhna uhcna hucna chuna hcuna nucah uncah ncuah cnuah ucnah cunah nuach unach nauch anuch uanch aunch ncauh cnauh nacuh ancuh canuh acnuh ucanh cuanh uacnh aucnh caunh acunh nuhac unhac nhuac hnuac uhnac hunac nuahc unahc nauhc anuhc uanhc aunhc nhauc hnauc nahuc anhuc hanuc ahnuc uhanc huanc uahnc auhnc haunc ahunc nchau cnhau nhcau hncau chnau hcnau ncahu cnahu nachu anchu canhu acnhu nhacu hnacu nahcu anhcu hancu ahncu chanu hcanu cahnu achnu hacnu ahcnu uchan cuhan uhcan hucan chuan hcuan ucahn cuahn uachn auchn cauhn acuhn uhacn huacn uahcn auhcn haucn ahucn chaun hcaun cahun achun hacun ahcun
Note: these 'words' (valid or invalid) are all the permutations of the word nucha. These words are obtained by scrambling the letters in nucha.