b-u bbb bbm bbn bbo bbr bbt bbu bmb bmm bmn bmo bmr bmt bmu bmz bnb bnn bno bnr bnt bnu bnz bob bom bon boo bor bot bou boz brb brm brn bro brr brt bru brz btb btm btn bto btr btt btu btz bub bum bun buo bur but buu buz bzn bzo bzr bzu bzz m-o m-r mbb mbm mbo mbr mbt mbu mmb mmm mmn mmo mmr mmt mmu mmz mnb mnm mnn mno mnr mnt mnu mnz mob mom mon moo mor mot mou moz mrb mrm mrn mro mrr mrt mru mrz mtb mtm mtn mto mtr mtt mtu mub mum mun mur mut muu mzb mzm mzn mzt nbb nbm nbn nbo nbr nbt nbu nmb nmm nmn nmo nmr nmt nmu nmz nnb nnm nnn nno nnt nnu nnz no- nob nom non noo nor not nou noz nrb nrm nrn nro nrr nrt nru nrz ntb ntm ntn nto ntr ntt ntu ntz nub num nun nuo nur nut nuu nzb nzo nzz ob- obb obm obn obo obr obt obu om- omb omm omn omo omr omt omu omz on- onb onn ono onr ont onu oo- oob oom oon ooo oor oot or- orb orm orn oro orr ort oru orz ot- otb otm otn oto otr ott otu otz ou- oum oun ouo our out ozm ozo ozt ozu ozz rbb rbm rbn rbo rbr rbt rbu rmb rmm rmn rmo rmr rmt rnb rnm rnn rno rnr rnt rnu rnz rob rom ron roo ror rot rou roz rrb rrm rrn rrr rrt rru rtb rtm rtn rto rtr rtt rtu rtz rub rum run ruo rur rut ruu ruz rzb rzm rzo tbb tbm tbn tbo tbr tbt tbu tbz tmb tmm tmn tmo tmr tmt tmu tmz tnb tnm tnn tno tnr tnt tnz to- tob tom ton too tor tot tou toz trb trm trn tro trr trt tru trz ttb ttm ttn tto ttr ttt ttu tub tum tun tuo tur tut tuu tuz tzu ubb ubn ubo ubr ubt ubu um- umb umm umn umo umr umt umu un- unb unm unn uno unr unt unu uob uom uon uoo uor uot ur- urb urm urn uro urr urt uru urz utb utm utn uto utr utt utu utz uum uun uur uut uuu uzb uzo uzu zbb zbm zbr zbt zmb zmm zmt znn zno zo- zob zom zon zoo zor zot zou zro ztm ztr zub zum zun zur zut zuz zzr zzt zzz