a-a a-b a-t aaa aab aam aan aao aar aat aau ab- aba abb abm abn abo abr abt abu ama amb amm amn amo amr amt amu an- ana anb anm ann ano anr ant anu aoa aob aom aon aoo aor aot aou ar- ara arb arm arn aro arr art aru at- ata atb atm atn ato atr att atu au- aua aub aum aun auo aur aut b-u baa bab bam ban bao bar bat bau bba bbb bbm bbn bbo bbr bbt bbu bma bmb bmm bmn bmo bmr bmt bmu bna bnb bnn bno bnr bnt bnu boa bob bom bon boo bor bot bou bra brb brm brn bro brr brt bru bta btb btm btn bto btr btt btu bua bub bum bun buo bur but buu m-o m-r maa mab mam man mao mar mat mau mba mbb mbm mbo mbr mbt mbu mma mmb mmm mmn mmo mmr mmt mmu mna mnb mnm mnn mno mnr mnt mnu moa mob mom mon moo mor mot mou mra mrb mrm mrn mro mrr mrt mru mta mtb mtm mtn mto mtr mtt mtu mua mub mum mun mur mut muu naa nab nam nan nao nar nat nau nba nbb nbm nbn nbo nbr nbt nbu nma nmb nmm nmn nmo nmr nmt nmu nna nnb nnm nnn nno nnt nnu no- noa nob nom non noo nor not nou nra nrb nrm nrn nro nrr nrt nru nta ntb ntm ntn nto ntr ntt ntu nua nub num nun nuo nur nut nuu oaa oab oam oan oao oar oat oau ob- oba obb obm obn obo obr obt obu om- oma omb omm omn omo omr omt omu on- ona onb onn ono onr ont onu oo- ooa oob oom oon ooo oor oot or- ora orb orm orn oro orr ort oru ot- ota otb otm otn oto otr ott otu ou- oua oum oun ouo our out ra- raa rab ram ran rao rar rat rau rba rbb rbm rbn rbo rbr rbt rbu rma rmb rmm rmn rmo rmr rmt rna rnb rnm rnn rno rnr rnt rnu roa rob rom ron roo ror rot rou rra rrb rrm rrn rrr rrt rru rta rtb rtm rtn rto rtr rtt rtu rua rub rum run ruo rur rut ruu taa tab tam tan tao tar tat tau tba tbb tbm tbn tbo tbr tbt tbu tma tmb tmm tmn tmo tmr tmt tmu tna tnb tnm tnn tno tnr tnt to- toa tob tom ton too tor tot tou tra trb trm trn tro trr trt tru tta ttb ttm ttn tto ttr ttt ttu tua tub tum tun tuo tur tut tuu ua- uaa uab uam uan uao uar uat uau uba ubb ubn ubo ubr ubt ubu um- uma umb umm umn umo umr umt umu un- una unb unm unn uno unr unt unu uoa uob uom uon uoo uor uot ur- ura urb urm urn uro urr urt uru uta utb utm utn uto utr utt utu uua uum uun uur uut uuu