clast lcast calst aclst lacst alcst clsat lcsat cslat sclat lscat slcat caslt acslt csalt scalt asclt saclt lasct alsct lsact slact aslct salct clats lcats calts aclts lacts alcts cltas lctas ctlas tclas ltcas tlcas catls actls ctals tcals atcls tacls latcs altcs ltacs tlacs atlcs talcs clsta lcsta cslta sclta lscta slcta cltsa lctsa ctlsa tclsa ltcsa tlcsa cstla sctla ctsla tcsla stcla tscla lstca sltca ltsca tlsca stlca tslca castl acstl csatl scatl asctl sactl catsl actsl ctasl tcasl atcsl tacsl cstal sctal ctsal tcsal stcal tscal astcl satcl atscl tascl stacl tsacl lastc alstc lsatc slatc asltc saltc latsc altsc ltasc tlasc atlsc talsc lstac sltac ltsac tlsac stlac tslac astlc satlc atslc taslc stalc tsalc
Note: these 'words' (valid or invalid) are all the permutations of the word clast. These words are obtained by scrambling the letters in clast.