bbbb bblb blbt blno blob blon bloo blot blou blub blut bobb bobo bobu boll boln bolo bolt bolu bonn bono bont bonu boob bool boon boot botb botn boto bott boul boun bout btob bttb bubb bubo bubu bulb bull bult bulu bunb bunn buno bunt bunu buol buon but- buto butt llll lloo lob- lobb lobo loll lolo lono lont loob lool loon loot lotl loto lott loul loun lout louu ltbl ltnt lull lulu lunn luno lunt nbbo nnnn nnot nntn nobo nobu noll nolo nolt non- nonn nono nont nonu noo- noob nool noon nooo noot not- noto nott noul noun nout ntnu ntto nubl null nunn nuno nunt nuon nutt nutu obbo oblu obol obon obot olbo ollo olon olot oltu onno onon ont- onto onut oolo oont oooo ootb oto- oton otoo otto ottu oulu oun- out- outb outo ouu- tlon tnut tobo tobt tobu tol- toll tolo tolt tolu tonb tonn tono tonu tool toon toot toto tott toul toun tout ttbb tton tttt ttul tubb tubo tubu tull tulo tulu tunb tunn tuno tunu tutl tuto tutt tutu tuuo ubbo ublo ubon ullo ulno ulo- ulto ultt ulul unno unon untb unto unut utto uttu uulu uuno uuuu