bbb bbf bbm bbn bbo bbr bbt bfb bff bfm bfn bfo bfr bft bfz bmb bmf bmm bmn bmo bmr bmt bmz bnb bnf bnn bno bnr bnt bnz bob bof bom bon boo bor bot boz brb brf brm brn bro brr brt brz btb btf btm btn bto btr btt btz bzf bzn bzo bzr bzz fbb fbf fbm fbn fbo fbr fbt fff ffm ffn ffo ffr fft ffz fmb fmf fmm fmn fmo fmr fmt fnb fnf fnm fnn fnr fnt fnz fob fof fom fon foo for fot foz frb frf frm frn fro frr frt ftb ftf ftm ftn fto ftr ftt ftz m-f m-o m-r mbb mbf mbm mbo mbr mbt mfb mff mfm mfn mfo mfr mft mfz mmb mmf mmm mmn mmo mmr mmt mmz mnb mnf mnm mnn mno mnr mnt mnz mob mof mom mon moo mor mot moz mrb mrf mrm mrn mro mrr mrt mrz mtb mtf mtm mtn mto mtr mtt mzb mzf mzm mzn mzt nbb nbf nbm nbn nbo nbr nbt nfb nff nfn nfo nfr nft nmb nmm nmn nmo nmr nmt nmz nnb nnf nnm nnn nno nnt nnz no- nob nof nom non noo nor not noz nrb nrf nrm nrn nro nrr nrt nrz ntb ntf ntm ntn nto ntr ntt ntz nzb nzf nzo nzz ob- obb obf obm obn obo obr obt of- ofb off ofm ofn ofo ofr oft ofz om- omb omf omm omn omo omr omt omz on- onb onf onn ono onr ont oo- oob oof oom oon ooo oor oot or- orb orf orm orn oro orr ort orz ot- otb otf otm otn oto otr ott otz ozm ozo ozt ozz rbb rbf rbm rbn rbo rbr rbt rfb rff rfm rfn rfo rfr rft rfz rmb rmf rmm rmn rmo rmr rmt rnb rnm rnn rno rnr rnt rnz rob rof rom ron roo ror rot roz rrb rrf rrm rrn rrr rrt rtb rtf rtm rtn rto rtr rtt rtz rzb rzm rzo tbb tbf tbm tbn tbo tbr tbt tbz tfb tff tfm tfn tfo tfr tft tmb tmf tmm tmn tmo tmr tmt tmz tnb tnf tnm tnn tno tnr tnt tnz to- tob tof tom ton too tor tot toz trb trf trm trn tro trr trt trz ttb ttf ttm ttn tto ttr ttt tzf zbb zbm zbr zbt zfn zfr zmb zmm zmt znn zno zo- zob zof zom zon zoo zor zot zro ztm ztr zzr zzt zzz