bbb bbk bbm bbn bbo bbr bbt bkb bkk bkm bkn bko bkr bkt bmb bmk bmm bmn bmo bmr bmt bnb bnk bnn bno bnr bnt bob bok bom bon boo bor bot brb brk brm brn bro brr brt btb btk btm btn bto btr btt k-t kbb kbk kbm kbn kbo kbr kkb kkk kkm kkn kkr kkt kmb kmk kmm kmo kmt kn- knk knm knn kno knr knt kob kok kom kon koo kor kot krk krn kro krr krt ktb ktk ktm ktn kto ktr ktt m-o m-r mbb mbk mbm mbo mbr mbt mkb mkk mkm mkn mko mkr mkt mmb mmk mmm mmn mmo mmr mmt mnb mnk mnm mnn mno mnr mnt mob mok mom mon moo mor mot mrb mrk mrm mrn mro mrr mrt mtb mtk mtm mtn mto mtr mtt nbb nbk nbm nbn nbo nbr nbt nkk nkm nkn nko nkr nkt nmb nmk nmm nmn nmo nmr nmt nnb nnk nnm nnn nno nnt no- nob nok nom non noo nor not nrb nrk nrm nrn nro nrr nrt ntb ntk ntm ntn nto ntr ntt ob- obb obk obm obn obo obr obt okb okk oko okr om- omb omm omn omo omr omt on- onb onk onn ono onr ont oo- oob ook oom oon ooo oor oot or- orb ork orm orn oro orr ort ot- otb otk otm otn oto otr ott rbb rbk rbm rbn rbo rbr rbt rkb rkk rkm rko rkt rmb rmm rmn rmo rmr rmt rnb rnm rnn rno rnr rnt rob rok rom ron roo ror rot rrb rrk rrm rrn rrr rrt rtb rtk rtm rtn rto rtr rtt tbb tbk tbm tbn tbo tbr tbt tkb tkk tkm tko tkr tkt tmb tmk tmm tmn tmo tmr tmt tnb tnk tnm tnn tno tnr tnt to- tob tok tom ton too tor tot trb trk trm trn tro trr trt ttb ttk ttm ttn tto ttr ttt