slubb lsubb sulbb uslbb lusbb ulsbb slbub lsbub sblub bslub lbsub blsub sublb usblb sbulb bsulb ubslb buslb lubsb ulbsb lbusb blusb ublsb bulsb slubb lsubb sulbb uslbb lusbb ulsbb slbub lsbub sblub bslub lbsub blsub sublb usblb sbulb bsulb ubslb buslb lubsb ulbsb lbusb blusb ublsb bulsb slbbu lsbbu sblbu bslbu lbsbu blsbu slbbu lsbbu sblbu bslbu lbsbu blsbu sbblu bsblu sbblu bsblu bbslu bbslu lbbsu blbsu lbbsu blbsu bblsu bblsu subbl usbbl sbubl bsubl ubsbl busbl subbl usbbl sbubl bsubl ubsbl busbl sbbul bsbul sbbul bsbul bbsul bbsul ubbsl bubsl ubbsl bubsl bbusl bbusl lubbs ulbbs lbubs blubs ublbs bulbs lubbs ulbbs lbubs blubs ublbs bulbs lbbus blbus lbbus blbus bblus bblus ubbls bubls ubbls bubls bbuls bbuls
Note: these 'words' (valid or invalid) are all the permutations of the word slubb. These words are obtained by scrambling the letters in slubb.