bulks ublks bluks lbuks ulbks lubks bukls ubkls bkuls kbuls ukbls kubls blkus lbkus bklus kblus lkbus klbus ulkbs lukbs uklbs kulbs lkubs klubs bulsk ublsk blusk lbusk ulbsk lubsk buslk ubslk bsulk sbulk usblk sublk blsuk lbsuk bsluk sbluk lsbuk slbuk ulsbk lusbk uslbk sulbk lsubk slubk buksl ubksl bkusl kbusl ukbsl kubsl buskl ubskl bsukl sbukl usbkl subkl bksul kbsul bskul sbkul ksbul skbul uksbl kusbl uskbl sukbl ksubl skubl blksu lbksu bklsu kblsu lkbsu klbsu blsku lbsku bslku sblku lsbku slbku bkslu kbslu bsklu sbklu ksblu skblu lksbu klsbu lskbu slkbu kslbu sklbu ulksb luksb uklsb kulsb lkusb klusb ulskb luskb uslkb sulkb lsukb slukb ukslb kuslb usklb suklb ksulb skulb lksub klsub lskub slkub kslub sklub
Note: these 'words' (valid or invalid) are all the permutations of the word bulks. These words are obtained by scrambling the letters in bulks.