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