flubs lfubs fulbs uflbs lufbs ulfbs flbus lfbus fblus bflus lbfus blfus fubls ufbls fbuls bfuls ubfls bufls lubfs ulbfs lbufs blufs ublfs bulfs flusb lfusb fulsb uflsb lufsb ulfsb flsub lfsub fslub sflub lsfub slfub fuslb ufslb fsulb sfulb usflb suflb lusfb ulsfb lsufb slufb uslfb sulfb flbsu lfbsu fblsu bflsu lbfsu blfsu flsbu lfsbu fslbu sflbu lsfbu slfbu fbslu bfslu fsblu sfblu bsflu sbflu lbsfu blsfu lsbfu slbfu bslfu sblfu fubsl ufbsl fbusl bfusl ubfsl bufsl fusbl ufsbl fsubl sfubl usfbl sufbl fbsul bfsul fsbul sfbul bsful sbful ubsfl busfl usbfl subfl bsufl sbufl lubsf ulbsf lbusf blusf ublsf bulsf lusbf ulsbf lsubf slubf uslbf sulbf lbsuf blsuf lsbuf slbuf bsluf sbluf ubslf buslf usblf sublf bsulf sbulf
Note: these 'words' (valid or invalid) are all the permutations of the word flubs. These words are obtained by scrambling the letters in flubs.