welts ewlts wlets lwets elwts lewts wetls ewtls wtels twels etwls tewls wltes lwtes wtles twles ltwes tlwes eltws letws etlws telws ltews tlews welst ewlst wlest lwest elwst lewst weslt ewslt wselt swelt eswlt sewlt wlset lwset wslet swlet lswet slwet elswt leswt eslwt selwt lsewt slewt wetsl ewtsl wtesl twesl etwsl tewsl westl ewstl wsetl swetl eswtl sewtl wtsel twsel wstel swtel tswel stwel etswl teswl estwl setwl tsewl stewl wltse lwtse wtlse twlse ltwse tlwse wlste lwste wslte swlte lswte slwte wtsle twsle wstle swtle tswle stwle ltswe tlswe lstwe sltwe tslwe stlwe eltsw letsw etlsw telsw ltesw tlesw elstw lestw esltw seltw lsetw sletw etslw teslw estlw setlw tselw stelw ltsew tlsew lstew sltew tslew stlew
Note: these 'words' (valid or invalid) are all the permutations of the word welts. These words are obtained by scrambling the letters in welts.