bbbb bbbs bbhs bblb bbls bhhs bhut bhuu blbt blhs blls blss blst blts blub blus blut bshs bsts bths btss bttb btus bubb bubs bubu buhl buhs bulb bull buls bult bulu bush buss bust busu but- buts butt buus hbbs hbhs hbss hbtl hbtu hhhh hhhs hhus hlhs hlss hlul hshs hsls hsts hths hubb hubl hubs huhs huhu hull huls hult hulu hush huss hust huth huts hutt hutu huub huus lbhs lhbs lhhh lhhs lhss llbs llhs llll lsbu lshs lsts ltbl lths lubs luhu lull lulu lush luss lust luth luts sbbs sbhs sbst sbus shbs shbt shhh shhs shl- shls shts shub shul shus shut shuu slhs slst slsu slts slub slut sshl sshs sslt sssb sssh ssss sstb ssth sstl ssts stbs sths stlh stlt stss stub stul stus stut sub- subb subh subl subs suhb suhl sul- sulh sull sult sulu sus- suss sust susu sutu suus tbbs tbhs tbst thbs thss thtb thts thul thus tshb tshs tsst tsts ttbb ttss tttt ttul tubb tubs tubu tuhs tuht tuhu tull tulu tush tuss tust tutl tuts tutt tutu ubls uhss uhuh ults ultt ulul ulus usbl usbs ushs ushu uslu ussb usss usst ussu ustb usts usul usus utsl uttu uulu uuuu