-er b-u bbb bbe bbm bbn bbr bbt bbu be- beb bee bem ben ber bet beu bmb bme bmm bmn bmr bmt bmu bnb bne bnn bnr bnt bnu brb bre brm brn brr brt bru btb bte btm btn btr btt btu bub bue bum bun bur but buu ebb ebe ebm ebn ebr ebt ebu eeb eee eem een eer eet em- emb eme emm emn emr emt emu en- enb ene enm enn enr ent enu erb ere erm ern err ert eru etb ete etm etn etr ett etu eu- eub eue eun eur eut m-r mbb mbe mbm mbr mbt mbu meb mee mem men mer met meu mmb mme mmm mmn mmr mmt mmu mnb mne mnm mnn mnr mnt mnu mrb mre mrm mrn mrr mrt mru mtb mte mtm mtn mtr mtt mtu mub mue mum mun mur mut muu nbb nbe nbm nbn nbr nbt nbu ne- neb nee nem nen ner net neu nmb nme nmm nmn nmr nmt nmu nnb nne nnm nnn nnt nnu nrb nre nrm nrn nrr nrt nru ntb nte ntm ntn ntr ntt ntu nub nue num nun nur nut nuu rbb rbe rbm rbn rbr rbt rbu re- reb ree rem ren rer ret reu rmb rme rmm rmn rmr rmt rnb rnm rnn rnr rnt rnu rrb rrm rrn rrr rrt rru rtb rte rtm rtn rtr rtt rtu rub rue rum run rur rut ruu tbb tbe tbm tbn tbr tbt tbu te- teb tee tem ten ter tet teu tmb tme tmm tmn tmr tmt tmu tnb tne tnm tnn tnr tnt trb tre trm trn trr trt tru ttb tte ttm ttn ttr ttt ttu tub tue tum tun tur tut tuu ubb ube ubn ubr ubt ubu ueb uee uem uen uer uet um- umb ume umm umn umr umt umu un- unb une unm unn unr unt unu ur- urb ure urm urn urr urt uru utb ute utm utn utr utt utu uue uum uun uur uut uuu