bbb bbm bbn bbo bbr bbt bmb bmm bmn bmo bmr bmt bnb bnn bno bnr bnt bob bom bon boo bor bot brb brm brn bro brr brt btb btm btn bto btr btt m-o m-r mbb mbm mbo mbr mbt mmb mmm mmn mmo mmr mmt mnb mnm mnn mno mnr mnt mob mom mon moo mor mot mrb mrm mrn mro mrr mrt mtb mtm mtn mto mtr mtt nbb nbm nbn nbo nbr nbt nmb nmm nmn nmo nmr nmt nnb nnm nnn nno nnt no- nob nom non noo nor not nrb nrm nrn nro nrr nrt ntb ntm ntn nto ntr ntt ob- obb obm obn obo obr obt om- omb omm omn omo omr omt on- onb onn ono onr ont oo- oob oom oon ooo oor oot or- orb orm orn oro orr ort ot- otb otm otn oto otr ott rbb rbm rbn rbo rbr rbt rmb rmm rmn rmo rmr rmt rnb rnm rnn rno rnr rnt rob rom ron roo ror rot rrb rrm rrn rrr rrt rtb rtm rtn rto rtr rtt tbb tbm tbn tbo tbr tbt tmb tmm tmn tmo tmr tmt tnb tnm tnn tno tnr tnt to- tob tom ton too tor tot trb trm trn tro trr trt ttb ttm ttn tto ttr ttt