heuch ehuch huech uhech euhch uehch hecuh ehcuh hceuh cheuh echuh cehuh huceh uhceh hcueh chueh ucheh cuheh euchh uechh ecuhh ceuhh ucehh cuehh heuhc ehuhc huehc uhehc euhhc uehhc hehuc ehhuc hheuc hheuc ehhuc hehuc huhec uhhec hhuec hhuec uhhec huhec euhhc uehhc ehuhc heuhc uhehc huehc hechu ehchu hcehu chehu echhu cehhu hehcu ehhcu hhecu hhecu ehhcu hehcu hcheu chheu hhceu hhceu chheu hcheu echhu cehhu ehchu hechu chehu hcehu huche uhche hcuhe chuhe uchhe cuhhe huhce uhhce hhuce hhuce uhhce huhce hchue chhue hhcue hhcue chhue hchue uchhe cuhhe uhche huche chuhe hcuhe euchh uechh ecuhh ceuhh ucehh cuehh euhch uehch ehuch heuch uhech huech echuh cehuh ehcuh hecuh cheuh hceuh ucheh cuheh uhceh huceh chueh hcueh
Note: these 'words' (valid or invalid) are all the permutations of the word heuch. These words are obtained by scrambling the letters in heuch.