-er bbb bbe bbg bbm bbn bbr be- beb bee beg bem ben ber bgb bge bgg bgm bgn bgr bmb bme bmg bmm bmn bmr bnb bne bng bnn bnr brb bre brg brm brn brr ebb ebe ebg ebm ebn ebr eeb eee eeg eem een eer egb ege egg egm egn egr em- emb eme emg emm emn emr en- enb ene eng enm enn enr erb ere erg erm ern err gbe gbg gbm gbn gbr ge- geb gee geg gem gen ger ggb ggg ggm ggn ggr gmb gme gmg gmm gmn gmr gnb gne gnm gnn gnr grb gre grg grm grn grr m-r mbb mbe mbg mbm mbr meb mee meg mem men mer mgb mge mgm mgn mgr mmb mme mmg mmm mmn mmr mnb mne mng mnm mnn mnr mrb mre mrg mrm mrn mrr nbb nbe nbg nbm nbn nbr ne- neb nee neg nem nen ner ngb nge ngg ngm ngn nmb nme nmg nmm nmn nmr nnb nne nng nnm nnn nrb nre nrg nrm nrn nrr rbb rbe rbg rbm rbn rbr re- reb ree reg rem ren rer rgb rge rgg rgn rgr rmb rme rmg rmm rmn rmr rnb rng rnm rnn rnr rrb rrg rrm rrn rrr