b-u bbb bbi bbl bbm bbn bbr bbu bi- bib bii bil bim bin bir biu blb bli bll blm bln blr blu bmb bmi bml bmm bmn bmr bmu bnb bni bnl bnn bnr bnu brb bri brl brm brn brr bru bub bui bul bum bun bur buu ibb ibi ibl ibm ibn ibr ibu iib iii iil iim iin iir iiu il- ilb ili ill ilm iln ilr ilu im- imb imi iml imm imn imu in- inb ini inl inm inn inr inu ir- irb iri irl irm irn irr iru iu- iub iui ium iur lbb lbi lbl lbm lbr lbu lib lii lil lim lin lir liu llb lli lll llm lln llr llu lmb lmi lml lmm lmn lmr lmu lnb lni lnl lnm lnn lnr lnu lrb lri lrm lrn lrr lru lub lui lul lum lun lur luu m-r mbb mbi mbl mbm mbr mbu mi- mib mii mil mim min mir miu mlb mli mll mlm mln mlr mlu mmb mmi mml mmm mmn mmr mmu mnb mni mnl mnm mnn mnr mnu mrb mri mrl mrm mrn mrr mru mub mui mul mum mun mur muu n-i nbb nbi nbl nbm nbn nbr nbu nib nii nil nim nin nir niu nlb nli nll nlm nln nlr nlu nmb nmi nml nmm nmn nmr nmu nnb nni nnl nnm nnn nnu nrb nri nrl nrm nrn nrr nru nub nui nul num nun nur nuu rbb rbi rbl rbm rbn rbr rbu rib rii ril rim rin rir rli rll rlm rln rlr rlu rmb rmi rml rmm rmn rmr rnb rni rnm rnn rnr rnu rrb rri rrl rrm rrn rrr rru rub rui rum run rur ruu ubb ubi ubl ubn ubr ubu uib uii uil uim uin uir uiu ulb uli ull ulm uln ulr ulu um- umb umi uml umm umn umr umu un- unb uni unl unm unn unr unu ur- urb uri url urm urn urr uru uum uun uur uuu