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