-er bbb bbe bbg bbm bbn bbo bbr be- beb bee beg bem ben beo ber bgb bge bgg bgm bgn bgo bgr bmb bme bmg bmm bmn bmo bmr bnb bne bng bnn bno bnr bob boe bog bom bon boo bor brb bre brg brm brn bro brr ebb ebe ebg ebm ebn ebo ebr eeb eee eeg eem een eeo eer egb ege egg egm egn ego egr em- emb eme emg emm emn emo emr en- enb ene eng enm enn eno enr eo- eob eoe eog eom eon eoo eor erb ere erg erm ern ero err gbe gbg gbm gbn gbo gbr ge- geb gee geg gem gen geo ger ggb ggg ggm ggn ggo ggr gmb gme gmg gmm gmn gmo gmr gnb gne gnm gnn gno gnr gob goe gog gom gon goo gor grb gre grg grm grn gro grr m-o m-r mbb mbe mbg mbm mbo mbr meb mee meg mem men meo mer mgb mge mgm mgn mgo mgr mmb mme mmg mmm mmn mmo mmr mnb mne mng mnm mnn mno mnr mob moe mog mom mon moo mor mrb mre mrg mrm mrn mro mrr nbb nbe nbg nbm nbn nbo nbr ne- neb nee neg nem nen neo ner ngb nge ngg ngm ngn ngo nmb nme nmg nmm nmn nmo nmr nnb nne nng nnm nnn nno no- nob noe nog nom non noo nor nrb nre nrg nrm nrn nro nrr ob- obb obe obg obm obn obo obr oeb oee oeg oem oen oeo oer oge ogg ogn ogo om- omb ome omg omm omn omo omr on- onb one ong onn ono onr oo- oob oog oom oon ooo oor or- orb ore org orm orn oro orr rbb rbe rbg rbm rbn rbo rbr re- reb ree reg rem ren reo rer rgb rge rgg rgn rgo rgr rmb rme rmg rmm rmn rmo rmr rnb rng rnm rnn rno rnr rob roe rog rom ron roo ror rrb rrg rrm rrn rrr