-er bbb bbe bbg bbk bbm bbn bbo bbr bbs be- beb bee beg bek bem ben beo ber bes bgb bge bgg bgk bgm bgn bgo bgr bgs bkb bke bkg bkk bkm bkn bko bkr bks bmb bme bmg bmk bmm bmn bmo bmr bms bnb bne bng bnk bnn bno bnr bns bob boe bog bok bom bon boo bor bos brb bre brg brk brm brn bro brr brs bsb bse bsg bsk bsm bsn bso bsr bss ebb ebe ebg ebk ebm ebn ebo ebr ebs eeb eee eeg eek eem een eeo eer ees egb ege egg egm egn ego egr egs ekb eke ekg eko ekr eks em- emb eme emg emk emm emn emo emr ems en- enb ene eng enk enm enn eno enr ens eo- eob eoe eog eok eom eon eoo eor eos erb ere erg erk erm ern ero err ers es- esb ese esg esk esm esn eso esr ess gbe gbg gbk gbm gbn gbo gbr gbs ge- geb gee geg gek gem gen geo ger ges ggb ggg ggm ggn ggo ggr ggs gkb gkm gkn gko gks gmb gme gmg gmm gmn gmo gmr gms gnb gne gnm gnn gno gnr gns gob goe gog gok gom gon goo gor gos grb gre grg grk grm grn gro grr grs gsb gse gsg gsk gsm gsn gso gsr gss kbb kbe kbk kbm kbn kbo kbr kbs ke- keb kee keg kek kem ken keo ker kes kgb kgm kgo kgs kkb kke kkk kkm kkn kkr kks kmb kme kmg kmk kmm kmo kms kn- kne kng knk knm knn kno knr kob koe kog kok kom kon koo kor kos krg krk krn kro krr krs ksb kse ksg ksk ksm ksn kso ksr kss m-o m-r mbb mbe mbg mbk mbm mbo mbr mbs meb mee meg mek mem men meo mer mes mgb mge mgk mgm mgn mgo mgr mgs mkb mke mkg mkk mkm mkn mko mkr mks mmb mme mmg mmk mmm mmn mmo mmr mms mnb mne mng mnk mnm mnn mno mnr mns mob moe mog mok mom mon moo mor mos mrb mre mrg mrk mrm mrn mro mrr mrs msb mse msg msk msm msn mso msr mss nbb nbe nbg nbk nbm nbn nbo nbr nbs ne- neb nee neg nek nem nen neo ner nes ngb nge ngg ngk ngm ngn ngo ngs nke nkk nkm nkn nko nkr nks nmb nme nmg nmk nmm nmn nmo nmr nms nnb nne nng nnk nnm nnn nno nns no- nob noe nog nok nom non noo nor nos nrb nre nrg nrk nrm nrn nro nrr nrs nsb nse nsg nsk nsm nsn nso nsr nss ob- obb obe obg obk obm obn obo obr obs oeb oee oeg oem oen oeo oer oes oge ogg ogn ogo ogs okb oke okg okk oko okr oks om- omb ome omg omm omn omo omr oms on- onb one ong onk onn ono onr ons oo- oob oog ook oom oon ooo oor oos or- orb ore org ork orm orn oro orr ors os- osb ose osg osk osm osn oso osr oss rbb rbe rbg rbk rbm rbn rbo rbr rbs re- reb ree reg rek rem ren reo rer res rgb rge rgg rgk rgn rgo rgr rgs rkb rke rkg rkk rkm rko rks rmb rme rmg rmm rmn rmo rmr rms rnb rng rnm rnn rno rnr rns rob roe rog rok rom ron roo ror ros rrb rrg rrk rrm rrn rrr rrs rsb rse rsg rsk rsm rsn rso rsr rss sbb sbe sbg sbk sbm sbn sbo sbr sbs se- seb see seg sek sem sen seo ser ses sgb sge sgg sgk sgm sgn sgo sgr sgs sk- skb ske skg skk skm sko skr sks smb sme smg smk smm smn smo smr sms snb sne sng snk snm snn sno snr sns sob soe sog sok som son soo sor sos sr- srb sre srg srk srm srn sro srr srs ss- ssb sse ssg ssk ssm ssn sso ssr sss