hullo uhllo hlulo lhulo ulhlo luhlo hullo uhllo hlulo lhulo ulhlo luhlo hlluo lhluo hlluo lhluo llhuo llhuo ullho lulho ullho lulho lluho lluho hulol uhlol hluol lhuol ulhol luhol huoll uholl houll ohull uohll ouhll hloul lhoul holul ohlul lohul olhul ulohl luohl uolhl oulhl louhl oluhl hulol uhlol hluol lhuol ulhol luhol huoll uholl houll ohull uohll ouhll hloul lhoul holul ohlul lohul olhul ulohl luohl uolhl oulhl louhl oluhl hllou lhlou hllou lhlou llhou llhou hlolu lholu hollu ohllu lohlu olhlu hlolu lholu hollu ohllu lohlu olhlu llohu llohu lolhu ollhu lolhu ollhu ulloh luloh ulloh luloh lluoh lluoh ulolh luolh uollh oullh loulh olulh ulolh luolh uollh oullh loulh olulh llouh llouh loluh olluh loluh olluh
Note: these 'words' (valid or invalid) are all the permutations of the word hullo. These words are obtained by scrambling the letters in hullo.