burks ubrks bruks rbuks urbks rubks bukrs ubkrs bkurs kburs ukbrs kubrs brkus rbkus bkrus kbrus rkbus krbus urkbs rukbs ukrbs kurbs rkubs krubs bursk ubrsk brusk rbusk urbsk rubsk busrk ubsrk bsurk sburk usbrk subrk brsuk rbsuk bsruk sbruk rsbuk srbuk ursbk rusbk usrbk surbk rsubk srubk buksr ubksr bkusr kbusr ukbsr kubsr buskr ubskr bsukr sbukr usbkr subkr bksur kbsur bskur sbkur ksbur skbur uksbr kusbr uskbr sukbr ksubr skubr brksu rbksu bkrsu kbrsu rkbsu krbsu brsku rbsku bsrku sbrku rsbku srbku bksru kbsru bskru sbkru ksbru skbru rksbu krsbu rskbu srkbu ksrbu skrbu urksb ruksb ukrsb kursb rkusb krusb urskb ruskb usrkb surkb rsukb srukb uksrb kusrb uskrb sukrb ksurb skurb rksub krsub rskub srkub ksrub skrub
Note: these 'words' (valid or invalid) are all the permutations of the word burks. These words are obtained by scrambling the letters in burks.