-er bbb bbe bbg bbk bbm bbn bbo bbr be- beb bee beg bek bem ben beo ber bgb bge bgg bgk bgm bgn bgo bgr bkb bke bkg bkk bkm bkn bko bkr bmb bme bmg bmk bmm bmn bmo bmr bnb bne bng bnk bnn bno bnr bob boe bog bok bom bon boo bor brb bre brg brk brm brn bro brr ebb ebe ebg ebk ebm ebn ebo ebr eeb eee eeg eek eem een eeo eer egb ege egg egm egn ego egr ekb eke ekg eko ekr em- emb eme emg emk emm emn emo emr en- enb ene eng enk enm enn eno enr eo- eob eoe eog eok eom eon eoo eor erb ere erg erk erm ern ero err gbe gbg gbk gbm gbn gbo gbr ge- geb gee geg gek gem gen geo ger ggb ggg ggm ggn ggo ggr gkb gkm gkn gko gmb gme gmg gmm gmn gmo gmr gnb gne gnm gnn gno gnr gob goe gog gok gom gon goo gor grb gre grg grk grm grn gro grr kbb kbe kbk kbm kbn kbo kbr ke- keb kee keg kek kem ken keo ker kgb kgm kgo kkb kke kkk kkm kkn kkr kmb kme kmg kmk kmm kmo kn- kne kng knk knm knn kno knr kob koe kog kok kom kon koo kor krg krk krn kro krr m-o m-r mbb mbe mbg mbk mbm mbo mbr meb mee meg mek mem men meo mer mgb mge mgk mgm mgn mgo mgr mkb mke mkg mkk mkm mkn mko mkr mmb mme mmg mmk mmm mmn mmo mmr mnb mne mng mnk mnm mnn mno mnr mob moe mog mok mom mon moo mor mrb mre mrg mrk mrm mrn mro mrr nbb nbe nbg nbk nbm nbn nbo nbr ne- neb nee neg nek nem nen neo ner ngb nge ngg ngk ngm ngn ngo nke nkk nkm nkn nko nkr nmb nme nmg nmk nmm nmn nmo nmr nnb nne nng nnk nnm nnn nno no- nob noe nog nok nom non noo nor nrb nre nrg nrk nrm nrn nro nrr ob- obb obe obg obk obm obn obo obr oeb oee oeg oem oen oeo oer oge ogg ogn ogo okb oke okg okk oko okr om- omb ome omg omm omn omo omr on- onb one ong onk onn ono onr oo- oob oog ook oom oon ooo oor or- orb ore org ork orm orn oro orr rbb rbe rbg rbk rbm rbn rbo rbr re- reb ree reg rek rem ren reo rer rgb rge rgg rgk rgn rgo rgr rkb rke rkg rkk rkm rko rmb rme rmg rmm rmn rmo rmr rnb rng rnm rnn rno rnr rob roe rog rok rom ron roo ror rrb rrg rrk rrm rrn rrr