-er -ol bbb bbe bbg bbl bbm bbn bbo bbr be- beb bee beg bel bem ben beo ber bgb bge bgg bgl bgm bgn bgo bgr blb ble blg bll blm bln blo blr bmb bme bmg bml bmm bmn bmo bmr bnb bne bng bnl bnn bno bnr bob boe bog bol bom bon boo bor brb bre brg brl brm brn bro brr ebb ebe ebg ebl ebm ebn ebo ebr eeb eee eeg eel eem een eeo eer egb ege egg egl egm egn ego egr elb ele elg ell elm eln elo elr em- emb eme emg eml emm emn emo emr en- enb ene eng enl enm enn eno enr eo- eob eoe eog eol eom eon eoo eor erb ere erg erl erm ern ero err gbe gbg gbl gbm gbn gbo gbr ge- geb gee geg gel gem gen geo ger ggb ggg ggm ggn ggo ggr glb gle glg gll glm gln glo glr gmb gme gmg gml gmm gmn gmo gmr gnb gne gnl gnm gnn gno gnr gob goe gog gol gom gon goo gor grb gre grg grl grm grn gro grr lbb lbe lbg lbl lbm lbo lbr leb lee leg lel lem len leo ler lgb lge lgg lgl lgm lgn lgo lgr llb lle llg lll llm lln llo llr lmb lme lmg lml lmm lmn lmo lmr lnb lne lng lnl lnm lnn lno lnr lob loe log lol lom lon loo lor lrb lrg lrm lrn lro lrr m-o m-r mbb mbe mbg mbl mbm mbo mbr meb mee meg mel mem men meo mer mgb mge mgl mgm mgn mgo mgr mlb mle mlg mll mlm mln mlo mlr mmb mme mmg mml mmm mmn mmo mmr mnb mne mng mnl mnm mnn mno mnr mob moe mog mol mom mon moo mor mrb mre mrg mrl mrm mrn mro mrr nbb nbe nbg nbl nbm nbn nbo nbr ne- neb nee neg nel nem nen neo ner ngb nge ngg ngl ngm ngn ngo nlb nle nlg nll nlm nln nlo nlr nmb nme nmg nml nmm nmn nmo nmr nnb nne nng nnl nnm nnn nno no- nob noe nog nol nom non noo nor nrb nre nrg nrl nrm nrn nro nrr ob- obb obe obg obl obm obn obo obr oeb oee oeg oel oem oen oeo oer oge ogg ogl ogn ogo olb ole olg oll olm oln olo om- omb ome omg oml omm omn omo omr on- onb one ong onl onn ono onr oo- oob oog ool oom oon ooo oor or- orb ore org orl orm orn oro orr rbb rbe rbg rbl rbm rbn rbo rbr re- reb ree reg rel rem ren reo rer rgb rge rgg rgn rgo rgr rle rlg rll rlm rln rlo rlr rmb rme rmg rml rmm rmn rmo rmr rnb rng rnm rnn rno rnr rob roe rog rol rom ron roo ror rrb rrg rrl rrm rrn rrr