b-u bbb bbk bbl bbn bbs bbt bbu bkb bkk bkl bkn bks bkt blb blk bll bln bls blt blu bnb bnk bnl bnn bns bnt bnu bsb bsk bsl bsn bss bst bsu btb btk btl btn bts btt btu bub buk bul bun bus but buu k-t kbb kbk kbl kbn kbs kbu kkb kkk kkl kkn kks kkt kku kl- klb kls klt klu kn- knk knl knn knt knu ksb ksk ksl ksn kss kst ksu ktb ktk ktl ktn kts ktt ktu kub kuk kul kun kus kut kuu lbb lbk lbl lbs lbt lbu lkb lkl lks lkt llb llk lll lln lls llt llu lnb lnk lnl lnn lns lnt lnu lsb lsk lsl lsn lss lst lsu ltb ltk ltl lts ltt ltu lub luk lul lun lus lut luu nbb nbk nbl nbn nbs nbt nbu nkk nkn nks nkt nku nlb nlk nll nln nls nlt nlu nnb nnk nnl nnn nns nnt nnu nsb nsk nsl nsn nss nst nsu ntb ntk ntn nts ntt ntu nub nuk nul nun nus nut nuu sbb sbk sbl sbn sbs sbt sbu sk- skb skk skl sks skt sku slb slk sll sln sls slt slu snb snk snl snn sns snt snu ss- ssb ssk ssl ssn sss sst ssu stb stk stl stn sts stt stu sub suk sul sun sus sut suu tbb tbk tbl tbn tbs tbt tbu tkb tkk tkl tks tkt tlk tll tln tls tlt tlu tnb tnk tnl tnn tns tnt tsb tsk tsl tsn tss tst tsu ttb ttk ttl ttn tts ttt ttu tub tuk tul tun tus tut tuu ubb ubk ubl ubn ubs ubt ubu ukb ukk ukl ukn uku ulb ulk ull uln uls ult ulu un- unb unk unl unn uns unt unu usb usk usl usn uss ust usu utb utk utl utn uts utt utu uun uus uut uuu