schul cshul shcul hscul chsul hcsul scuhl csuhl suchl uschl cushl ucshl shucl hsucl suhcl ushcl huscl uhscl chusl hcusl cuhsl uchsl hucsl uhcsl schlu cshlu shclu hsclu chslu hcslu sclhu cslhu slchu lschu clshu lcshu shlcu hslcu slhcu lshcu hlscu lhscu chlsu hclsu clhsu lchsu hlcsu lhcsu sculh csulh suclh usclh cuslh ucslh scluh csluh slcuh lscuh clsuh lcsuh sulch uslch sluch lsuch ulsch lusch culsh uclsh clush lcush ulcsh lucsh shulc hsulc suhlc ushlc huslc uhslc shluc hsluc slhuc lshuc hlsuc lhsuc sulhc uslhc sluhc lsuhc ulshc lushc hulsc uhlsc hlusc lhusc ulhsc luhsc chuls hculs cuhls uchls hucls uhcls chlus hclus clhus lchus hlcus lhcus culhs uclhs cluhs lcuhs ulchs luchs hulcs uhlcs hlucs lhucs ulhcs luhcs
Note: these 'words' (valid or invalid) are all the permutations of the word schul. These words are obtained by scrambling the letters in schul.