lauch aluch luach ulach aulch ualch lacuh alcuh lcauh clauh acluh caluh lucah ulcah lcuah cluah uclah culah auclh uaclh aculh caulh ucalh cualh lauhc aluhc luahc ulahc aulhc ualhc lahuc alhuc lhauc hlauc ahluc haluc luhac ulhac lhuac hluac uhlac hulac auhlc uahlc ahulc haulc uhalc hualc lachu alchu lcahu clahu aclhu calhu lahcu alhcu lhacu hlacu ahlcu halcu lchau clhau lhcau hlcau chlau hclau achlu cahlu ahclu haclu chalu hcalu lucha ulcha lcuha cluha uclha culha luhca ulhca lhuca hluca uhlca hulca lchua clhua lhcua hlcua chlua hclua uchla cuhla uhcla hucla chula hcula auchl uachl acuhl cauhl ucahl cuahl auhcl uahcl ahucl haucl uhacl huacl achul cahul ahcul hacul chaul hcaul uchal cuhal uhcal hucal chual hcual
Note: these 'words' (valid or invalid) are all the permutations of the word lauch. These words are obtained by scrambling the letters in lauch.