bruts rbuts burts ubrts rubts urbts brtus rbtus btrus tbrus rtbus trbus butrs ubtrs bturs tburs utbrs tubrs rutbs urtbs rtubs trubs utrbs turbs brust rbust burst ubrst rubst urbst brsut rbsut bsrut sbrut rsbut srbut busrt ubsrt bsurt sburt usbrt subrt rusbt ursbt rsubt srubt usrbt surbt brtsu rbtsu btrsu tbrsu rtbsu trbsu brstu rbstu bsrtu sbrtu rsbtu srbtu btsru tbsru bstru sbtru tsbru stbru rtsbu trsbu rstbu srtbu tsrbu strbu butsr ubtsr btusr tbusr utbsr tubsr bustr ubstr bsutr sbutr usbtr subtr btsur tbsur bstur sbtur tsbur stbur utsbr tusbr ustbr sutbr tsubr stubr rutsb urtsb rtusb trusb utrsb tursb rustb urstb rsutb srutb usrtb surtb rtsub trsub rstub srtub tsrub strub utsrb tusrb ustrb sutrb tsurb sturb
Note: these 'words' (valid or invalid) are all the permutations of the word bruts. These words are obtained by scrambling the letters in bruts.