hetna ehtna htena thena ethna tehna henta ehnta hneta nheta enhta nehta htnea thnea hntea nhtea tnhea nthea etnha tenha entha netha tneha nteha hetan ehtan htean thean ethan tehan heatn ehatn haetn ahetn eahtn aehtn htaen thaen haten ahten tahen athen etahn teahn eathn aethn taehn atehn henat ehnat hneat nheat enhat nehat heant ehant haent ahent eahnt aehnt hnaet nhaet hanet ahnet nahet anhet enaht neaht eanht aenht naeht aneht htnae thnae hntae nhtae tnhae nthae htane thane hatne ahtne tahne athne hnate nhate hante ahnte nahte anhte tnahe ntahe tanhe atnhe nathe anthe etnah tenah entah netah tneah nteah etanh teanh eatnh aetnh taenh atenh enath neath eanth aenth naeth aneth tnaeh ntaeh taneh atneh nateh anteh
Note: these 'words' (valid or invalid) are all the permutations of the word hetna. These words are obtained by scrambling the letters in hetna.