-er bbb bbe bbk bbm bbn bbo bbr bbt be- beb bee bek bem ben beo ber bet bkb bke bkk bkm bkn bko bkr bkt bmb bme bmk bmm bmn bmo bmr bmt bnb bne bnk bnn bno bnr bnt bob boe bok bom bon boo bor bot brb bre brk brm brn bro brr brt btb bte btk btm btn bto btr btt ebb ebe ebk ebm ebn ebo ebr ebt eeb eee eek eem een eeo eer eet ekb eke eko ekr ekt em- emb eme emk emm emn emo emr emt en- enb ene enk enm enn eno enr ent eo- eob eoe eok eom eon eoo eor eot erb ere erk erm ern ero err ert etb ete etk etm etn eto etr ett k-t kbb kbe kbk kbm kbn kbo kbr ke- keb kee kek kem ken keo ker ket kkb kke kkk kkm kkn kkr kkt kmb kme kmk kmm kmo kmt kn- kne knk knm knn kno knr knt kob koe kok kom kon koo kor kot krk krn kro krr krt ktb kte ktk ktm ktn kto ktr ktt m-o m-r mbb mbe mbk mbm mbo mbr mbt meb mee mek mem men meo mer met mkb mke mkk mkm mkn mko mkr mkt mmb mme mmk mmm mmn mmo mmr mmt mnb mne mnk mnm mnn mno mnr mnt mob moe mok mom mon moo mor mot mrb mre mrk mrm mrn mro mrr mrt mtb mte mtk mtm mtn mto mtr mtt nbb nbe nbk nbm nbn nbo nbr nbt ne- neb nee nek nem nen neo ner net nke nkk nkm nkn nko nkr nkt nmb nme nmk nmm nmn nmo nmr nmt nnb nne nnk nnm nnn nno nnt no- nob noe nok nom non noo nor not nrb nre nrk nrm nrn nro nrr nrt ntb nte ntk ntm ntn nto ntr ntt ob- obb obe obk obm obn obo obr obt oeb oee oem oen oeo oer oet okb oke okk oko okr om- omb ome omm omn omo omr omt on- onb one onk onn ono onr ont oo- oob ook oom oon ooo oor oot or- orb ore ork orm orn oro orr ort ot- otb ote otk otm otn oto otr ott rbb rbe rbk rbm rbn rbo rbr rbt re- reb ree rek rem ren reo rer ret rkb rke rkk rkm rko rkt rmb rme rmm rmn rmo rmr rmt rnb rnm rnn rno rnr rnt rob roe rok rom ron roo ror rot rrb rrk rrm rrn rrr rrt rtb rte rtk rtm rtn rto rtr rtt tbb tbe tbk tbm tbn tbo tbr tbt te- teb tee tek tem ten teo ter tet tkb tke tkk tkm tko tkr tkt tmb tme tmk tmm tmn tmo tmr tmt tnb tne tnk tnm tnn tno tnr tnt to- tob toe tok tom ton too tor tot trb tre trk trm trn tro trr trt ttb tte ttk ttm ttn tto ttr ttt