culls uclls cluls lculs ulcls lucls culls uclls cluls lculs ulcls lucls cllus lclus cllus lclus llcus llcus ullcs lulcs ullcs lulcs llucs llucs culsl uclsl clusl lcusl ulcsl lucsl cusll ucsll csull scull uscll sucll clsul lcsul cslul sclul lscul slcul ulscl luscl uslcl sulcl lsucl slucl culsl uclsl clusl lcusl ulcsl lucsl cusll ucsll csull scull uscll sucll clsul lcsul cslul sclul lscul slcul ulscl luscl uslcl sulcl lsucl slucl cllsu lclsu cllsu lclsu llcsu llcsu clslu lcslu csllu scllu lsclu slclu clslu lcslu csllu scllu lsclu slclu llscu llscu lslcu sllcu lslcu sllcu ullsc lulsc ullsc lulsc llusc llusc ulslc luslc usllc sullc lsulc slulc ulslc luslc usllc sullc lsulc slulc llsuc llsuc lsluc slluc lsluc slluc
Note: these 'words' (valid or invalid) are all the permutations of the word culls. These words are obtained by scrambling the letters in culls.