lucos ulcos lcuos cluos uclos culos luocs ulocs loucs olucs uolcs oulcs lcous clous locus olcus colus oclus ucols cuols uocls oucls couls oculs lucso ulcso lcuso cluso uclso culso lusco ulsco lsuco sluco uslco sulco lcsuo clsuo lscuo slcuo csluo scluo ucslo cuslo usclo suclo csulo sculo luosc ulosc lousc olusc uolsc oulsc lusoc ulsoc lsuoc sluoc usloc suloc losuc olsuc lsouc slouc osluc soluc uoslc ouslc usolc suolc osulc soulc lcosu closu locsu olcsu colsu oclsu lcsou clsou lscou slcou cslou sclou loscu olscu lsocu slocu oslcu solcu coslu ocslu csolu scolu osclu soclu ucosl cuosl uocsl oucsl cousl ocusl ucsol cusol uscol sucol csuol scuol uoscl ouscl usocl suocl osucl soucl cosul ocsul csoul scoul oscul socul
Note: these 'words' (valid or invalid) are all the permutations of the word lucos. These words are obtained by scrambling the letters in lucos.