gauds aguds guads ugads augds uagds gadus agdus gdaus dgaus adgus dagus gudas ugdas gduas dguas udgas dugas audgs uadgs adugs daugs udags duags gausd agusd guasd ugasd augsd uagsd gasud agsud gsaud sgaud asgud sagud gusad ugsad gsuad sguad usgad sugad ausgd uasgd asugd saugd usagd suagd gadsu agdsu gdasu dgasu adgsu dagsu gasdu agsdu gsadu sgadu asgdu sagdu gdsau dgsau gsdau sgdau dsgau sdgau adsgu dasgu asdgu sadgu dsagu sdagu gudsa ugdsa gdusa dgusa udgsa dugsa gusda ugsda gsuda sguda usgda sugda gdsua dgsua gsdua sgdua dsgua sdgua udsga dusga usdga sudga dsuga sduga audsg uadsg adusg dausg udasg duasg ausdg uasdg asudg saudg usadg suadg adsug dasug asdug sadug dsaug sdaug udsag dusag usdag sudag dsuag sduag
Note: these 'words' (valid or invalid) are all the permutations of the word gauds. These words are obtained by scrambling the letters in gauds.