-er b-u bbb bbe bbm bbn bbr bbs bbu be- beb bee bem ben ber bes beu bmb bme bmm bmn bmr bms bmu bnb bne bnn bnr bns bnu brb bre brm brn brr brs bru bsb bse bsm bsn bsr bss bsu bub bue bum bun bur bus buu ebb ebe ebm ebn ebr ebs ebu eeb eee eem een eer ees em- emb eme emm emn emr ems emu en- enb ene enm enn enr ens enu erb ere erm ern err ers eru es- esb ese esm esn esr ess esu eu- eub eue eun eur eus m-r mbb mbe mbm mbr mbs mbu meb mee mem men mer mes meu mmb mme mmm mmn mmr mms mmu mnb mne mnm mnn mnr mns mnu mrb mre mrm mrn mrr mrs mru msb mse msm msn msr mss msu mub mue mum mun mur mus muu nbb nbe nbm nbn nbr nbs nbu ne- neb nee nem nen ner nes neu nmb nme nmm nmn nmr nms nmu nnb nne nnm nnn nns nnu nrb nre nrm nrn nrr nrs nru nsb nse nsm nsn nsr nss nsu nub nue num nun nur nus nuu rbb rbe rbm rbn rbr rbs rbu re- reb ree rem ren rer res reu rmb rme rmm rmn rmr rms rnb rnm rnn rnr rns rnu rrb rrm rrn rrr rrs rru rsb rse rsm rsn rsr rss rsu rub rue rum run rur rus ruu sbb sbe sbm sbn sbr sbs sbu se- seb see sem sen ser ses seu smb sme smm smn smr sms smu snb sne snm snn snr sns snu sr- srb sre srm srn srr srs ss- ssb sse ssm ssn ssr sss ssu sub sue sum sun sur sus suu ubb ube ubn ubr ubs ubu ueb uee uem uen uer ues um- umb ume umm umn umr ums umu un- unb une unm unn unr uns unu ur- urb ure urm urn urr urs uru usb use usm usn usr uss usu uue uum uun uur uus uuu