-er b-u bbb bbe bbl bbm bbn bbr bbu be- beb bee bel bem ben ber beu blb ble bll blm bln blr blu bmb bme bml bmm bmn bmr bmu bnb bne bnl bnn bnr bnu brb bre brl brm brn brr bru bub bue bul bum bun bur buu ebb ebe ebl ebm ebn ebr ebu eeb eee eel eem een eer elb ele ell elm eln elr elu em- emb eme eml emm emn emr emu en- enb ene enl enm enn enr enu erb ere erl erm ern err eru eu- eub eue eul eun eur lbb lbe lbl lbm lbr lbu leb lee lel lem len ler leu llb lle lll llm lln llr llu lmb lme lml lmm lmn lmr lmu lnb lne lnl lnm lnn lnr lnu lrb lrm lrn lrr lru lub lue lul lum lun lur luu m-r mbb mbe mbl mbm mbr mbu meb mee mel mem men mer meu mlb mle mll mlm mln mlr mlu mmb mme mml mmm mmn mmr mmu mnb mne mnl mnm mnn mnr mnu mrb mre mrl mrm mrn mrr mru mub mue mul mum mun mur muu nbb nbe nbl nbm nbn nbr nbu ne- neb nee nel nem nen ner neu nlb nle nll nlm nln nlr nlu nmb nme nml nmm nmn nmr nmu nnb nne nnl nnm nnn nnu nrb nre nrl nrm nrn nrr nru nub nue nul num nun nur nuu rbb rbe rbl rbm rbn rbr rbu re- reb ree rel rem ren rer reu rle rll rlm rln rlr rlu rmb rme rml rmm rmn rmr rnb rnm rnn rnr rnu rrb rrl rrm rrn rrr rru rub rue rum run rur ruu ubb ube ubl ubn ubr ubu ueb uee uel uem uen uer ulb ule ull ulm uln ulr ulu um- umb ume uml umm umn umr umu un- unb une unl unm unn unr unu ur- urb ure url urm urn urr uru uue uum uun uur uuu