hallo ahllo hlalo lhalo alhlo lahlo hallo ahllo hlalo lhalo alhlo lahlo hllao lhlao hllao lhlao llhao llhao allho lalho allho lalho llaho llaho halol ahlol hlaol lhaol alhol lahol haoll aholl hoall ohall aohll oahll hloal lhoal holal ohlal lohal olhal alohl laohl aolhl oalhl loahl olahl halol ahlol hlaol lhaol alhol lahol haoll aholl hoall ohall aohll oahll hloal lhoal holal ohlal lohal olhal alohl laohl aolhl oalhl loahl olahl hlloa lhloa hlloa lhloa llhoa llhoa hlola lhola holla ohlla lohla olhla hlola lhola holla ohlla lohla olhla lloha lloha lolha ollha lolha ollha alloh laloh alloh laloh llaoh llaoh alolh laolh aollh oallh loalh olalh alolh laolh aollh oallh loalh olalh lloah lloah lolah ollah lolah ollah
Note: these 'words' (valid or invalid) are all the permutations of the word hallo. These words are obtained by scrambling the letters in hallo.