b-u bbb bbi bbl bbm bbn bbr bbt bbu bbx bi- bib bii bil bim bin bir bit biu bix blb bli bll blm bln blr blt blu blx bmb bmi bml bmm bmn bmr bmt bmu bmx bnb bni bnl bnn bnr bnt bnu bnx brb bri brl brm brn brr brt bru brx btb bti btl btm btn btr btt btu btx bub bui bul bum bun bur but buu bux bxb bxi bxl bxm bxn bxx ibb ibi ibl ibm ibn ibr ibt ibu ibx iib iii iil iim iin iir iit iiu iix il- ilb ili ill ilm iln ilr ilt ilu ilx im- imb imi iml imm imn imt imu imx in- inb ini inl inm inn inr int inu inx ir- irb iri irl irm irn irr irt iru irx itb iti itl itm itn itt itu itx iu- iub iui ium iur iut ixi ixl ixn lbb lbi lbl lbm lbr lbt lbu lbx lib lii lil lim lin lir lit liu lix llb lli lll llm lln llr llt llu lmb lmi lml lmm lmn lmr lmt lmu lnb lni lnl lnm lnn lnr lnt lnu lrb lri lrm lrn lrr lrt lru ltb lti ltl ltm ltr ltt ltu ltx lub lui lul lum lun lur lut luu lux lxi lxr lxx m-r mbb mbi mbl mbm mbr mbt mbu mbx mi- mib mii mil mim min mir mit miu mix mlb mli mll mlm mln mlr mlt mlu mlx mmb mmi mml mmm mmn mmr mmt mmu mmx mnb mni mnl mnm mnn mnr mnt mnu mrb mri mrl mrm mrn mrr mrt mru mrx mtb mti mtl mtm mtn mtr mtt mtu mtx mub mui mul mum mun mur mut muu mux mxi mxl mxn mxr mxu n-i nbb nbi nbl nbm nbn nbr nbt nbu nbx nib nii nil nim nin nir nit niu nix nlb nli nll nlm nln nlr nlt nlu nlx nmb nmi nml nmm nmn nmr nmt nmu nnb nni nnl nnm nnn nnt nnu nrb nri nrl nrm nrn nrr nrt nru nrx ntb nti ntm ntn ntr ntt ntu ntx nub nui nul num nun nur nut nuu nux nxl nxt rbb rbi rbl rbm rbn rbr rbt rbu rbx rib rii ril rim rin rir rit rix rli rll rlm rln rlr rlt rlu rmb rmi rml rmm rmn rmr rmt rmx rnb rni rnm rnn rnr rnt rnu rrb rri rrl rrm rrn rrr rrt rru rtb rti rtl rtm rtn rtr rtt rtu rtx rub rui rum run rur rut ruu rux rxr t-x tbb tbi tbl tbm tbn tbr tbt tbu tib tii til tim tin tir tit tiu tix tli tll tlm tln tlr tlt tlu tlx tmb tmi tml tmm tmn tmr tmt tmu tmx tnb tni tnl tnm tnn tnr tnt tnx trb tri trl trm trn trr trt tru trx ttb tti ttl ttm ttn ttr ttt ttu ttx tub tui tul tum tun tur tut tuu tux txi txl txn txt txu ubb ubi ubl ubn ubr ubt ubu ubx uib uii uil uim uin uir uit uiu ulb uli ull ulm uln ulr ult ulu um- umb umi uml umm umn umr umt umu un- unb uni unl unm unn unr unt unu unx ur- urb uri url urm urn urr urt uru urx utb uti utl utm utn utr utt utu utx uum uun uur uut uuu uxb uxr uxt uxu xbl xbr xbx xii xin xit xiu xix xlb xli xlm xlr xlt xmi xml xmm xmr xmt xmu xmx xnu xrt xrx xti xtm xtr xtx xui xul xun xxi xxl xxx