b-u bbb bbl bbn bbr bbt bbu blb bll bln blr blt blu bnb bnl bnn bnr bnt bnu brb brl brn brr brt bru btb btl btn btr btt btu bub bul bun bur but buu lbb lbl lbr lbt lbu llb lll lln llr llt llu lnb lnl lnn lnr lnt lnu lrb lrn lrr lrt lru ltb ltl ltr ltt ltu lub lul lun lur lut luu nbb nbl nbn nbr nbt nbu nlb nll nln nlr nlt nlu nnb nnl nnn nnt nnu nrb nrl nrn nrr nrt nru ntb ntn ntr ntt ntu nub nul nun nur nut nuu rbb rbl rbn rbr rbt rbu rll rln rlr rlt rlu rnb rnn rnr rnt rnu rrb rrl rrn rrr rrt rru rtb rtl rtn rtr rtt rtu rub run rur rut ruu tbb tbl tbn tbr tbt tbu tll tln tlr tlt tlu tnb tnl tnn tnr tnt trb trl trn trr trt tru ttb ttl ttn ttr ttt ttu tub tul tun tur tut tuu ubb ubl ubn ubr ubt ubu ulb ull uln ulr ult ulu un- unb unl unn unr unt unu ur- urb url urn urr urt uru utb utl utn utr utt utu uun uur uut uuu

bbbb bblb blbt blub blur blut bnrr brrr brun brut btrt bttb bubb bubu bulb bull bult bulu bunb bunn bunt bunu bur- burb burl burn burr burt buru but- butt lblr lbrt llll lrrr ltbl ltnt lttr lull lulu lunn lunt lurt nlrb nnnn nntn nrlb nrrl nrtl ntnu ntrl ntru nttr nubl null nunn nunt nurl nurn nurr nurt nuru nutt nutu rbbb rbbr rnbr rnnt rnut rrrr rrun rtlt rubb rubu rull runn runt ruru rutl rutt rutu ruun tbrb tnut trtr trub trun trut truu ttbb tttt ttul tubb tubr tubu tull tulu tunb tunn tunu turb turn turr turt turu tutl tutt tutu ullr ultt ulul untb unut urun urur urut uttu uulu uuuu

blunt blurb blurr blurt brrrr brull brunn brunt bruun btr-t bulb- bull- bulul bulun bulut bunun bunut burn- burnt burru burtt burun burut butut lubun lubur lulul lurun nu-nu nunun nurlu nurun rutul ruutu t-nut tbtbt tbutt tllbr tllnn tntnt trubu trull ttttt tubul tulun turbt turn- turnt turnu turtu turul turut tutun tuuru ullur ululu uluru unnun unnur unnut unrun unurn urtlu urubu urutu uttur uturn uturu uuuuu

bbbbbb blublu brubru bububu bulbul burbur burnut burutu lunlun lurulu ntuntu nurulu rubutu rurutu tubul- tuntul turtur tururu tuttul tuttut u-turn ubuntu unblur unburn unlull unturn urturn

bbbbbbb bullnut bullrun burunlu lubuntu nubuntu tul-tul tut-tut unburnt

bbbbbbbb buruburu nrutturn

buln-buln runrunrun trntrntrn

turnturnturn

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