lhtot hltot lthot tlhot htlot thlot lhott hlott lohtt olhtt holtt ohltt ltoht tloht lotht oltht tolht otlht htolt tholt hotlt ohtlt tohlt othlt lhtto hltto lthto tlhto htlto thlto lhtto hltto lthto tlhto htlto thlto lttho tltho lttho tltho ttlho ttlho httlo thtlo httlo thtlo tthlo tthlo lhott hlott lohtt olhtt holtt ohltt lhtot hltot lthot tlhot htlot thlot lotht oltht ltoht tloht otlht tolht hotlt ohtlt htolt tholt othlt tohlt ltoth tloth lotth oltth tolth otlth lttoh tltoh lttoh tltoh ttloh ttloh lotth oltth ltoth tloth otlth tolth totlh ottlh ttolh ttolh ottlh totlh htotl thotl hottl ohttl tohtl othtl httol thtol httol thtol tthol tthol hottl ohttl htotl thotl othtl tohtl tothl otthl ttohl ttohl otthl tothl
Note: these 'words' (valid or invalid) are all the permutations of the word lhtot. These words are obtained by scrambling the letters in lhtot.