a-a a-b a-t aaa aab aam aan aao aat aau ab- aba abb abm abn abo abt abu ama amb amm amn amo amt amu an- ana anb anm ann ano ant anu aoa aob aom aon aoo aot aou at- ata atb atm atn ato att atu au- aua aub aum aun auo aut b-u baa bab bam ban bao bat bau bba bbb bbm bbn bbo bbt bbu bma bmb bmm bmn bmo bmt bmu bna bnb bnn bno bnt bnu boa bob bom bon boo bot bou bta btb btm btn bto btt btu bua bub bum bun buo but buu m-o maa mab mam man mao mat mau mba mbb mbm mbo mbt mbu mma mmb mmm mmn mmo mmt mmu mna mnb mnm mnn mno mnt mnu moa mob mom mon moo mot mou mta mtb mtm mtn mto mtt mtu mua mub mum mun mut muu naa nab nam nan nao nat nau nba nbb nbm nbn nbo nbt nbu nma nmb nmm nmn nmo nmt nmu nna nnb nnm nnn nno nnt nnu no- noa nob nom non noo not nou nta ntb ntm ntn nto ntt ntu nua nub num nun nuo nut nuu oaa oab oam oan oao oat oau ob- oba obb obm obn obo obt obu om- oma omb omm omn omo omt omu on- ona onb onn ono ont onu oo- ooa oob oom oon ooo oot ot- ota otb otm otn oto ott otu ou- oua oum oun ouo out taa tab tam tan tao tat tau tba tbb tbm tbn tbo tbt tbu tma tmb tmm tmn tmo tmt tmu tna tnb tnm tnn tno tnt to- toa tob tom ton too tot tou tta ttb ttm ttn tto ttt ttu tua tub tum tun tuo tut tuu ua- uaa uab uam uan uao uat uau uba ubb ubn ubo ubt ubu um- uma umb umm umn umo umt umu un- una unb unm unn uno unt unu uoa uob uom uon uoo uot uta utb utm utn uto utt utu uua uum uun uut uuu