-er bbb bbe bbm bbn bbo bbr bbt be- beb bee bem ben beo ber bet bmb bme bmm bmn bmo bmr bmt bnb bne bnn bno bnr bnt bob boe bom bon boo bor bot brb bre brm brn bro brr brt btb bte btm btn bto btr btt ebb ebe ebm ebn ebo ebr ebt eeb eee eem een eeo eer eet em- emb eme emm emn emo emr emt en- enb ene enm enn eno enr ent eo- eob eoe eom eon eoo eor eot erb ere erm ern ero err ert etb ete etm etn eto etr ett m-o m-r mbb mbe mbm mbo mbr mbt meb mee mem men meo mer met mmb mme mmm mmn mmo mmr mmt mnb mne mnm mnn mno mnr mnt mob moe mom mon moo mor mot mrb mre mrm mrn mro mrr mrt mtb mte mtm mtn mto mtr mtt nbb nbe nbm nbn nbo nbr nbt ne- neb nee nem nen neo ner net nmb nme nmm nmn nmo nmr nmt nnb nne nnm nnn nno nnt no- nob noe nom non noo nor not nrb nre nrm nrn nro nrr nrt ntb nte ntm ntn nto ntr ntt ob- obb obe obm obn obo obr obt oeb oee oem oen oeo oer oet om- omb ome omm omn omo omr omt on- onb one onn ono onr ont oo- oob oom oon ooo oor oot or- orb ore orm orn oro orr ort ot- otb ote otm otn oto otr ott rbb rbe rbm rbn rbo rbr rbt re- reb ree rem ren reo rer ret rmb rme rmm rmn rmo rmr rmt rnb rnm rnn rno rnr rnt rob roe rom ron roo ror rot rrb rrm rrn rrr rrt rtb rte rtm rtn rto rtr rtt tbb tbe tbm tbn tbo tbr tbt te- teb tee tem ten teo ter tet tmb tme tmm tmn tmo tmr tmt tnb tne tnm tnn tno tnr tnt to- tob toe tom ton too tor tot trb tre trm trn tro trr trt ttb tte ttm ttn tto ttr ttt