gusle ugsle gsule sgule usgle sugle gulse uglse gluse lguse ulgse lugse gslue sglue glsue lgsue slgue lsgue uslge sulge ulsge lusge sluge lsuge gusel ugsel gsuel sguel usgel sugel guesl ugesl geusl egusl uegsl eugsl gseul sgeul gesul egsul segul esgul usegl suegl uesgl eusgl seugl esugl gules ugles glues lgues ulges luges guels ugels geuls eguls uegls eugls gleus lgeus gelus eglus legus elgus ulegs luegs uelgs eulgs leugs elugs gsleu sgleu glseu lgseu slgeu lsgeu gselu sgelu geslu egslu seglu esglu glesu lgesu gelsu eglsu legsu elgsu slegu lsegu selgu eslgu lesgu elsgu usleg suleg ulseg luseg slueg lsueg uselg suelg ueslg euslg seulg esulg ulesg luesg uelsg eulsg leusg elusg sleug lseug selug eslug lesug elsug
Note: these 'words' (valid or invalid) are all the permutations of the word gusle. These words are obtained by scrambling the letters in gusle.