a-a a-b a-t aaa aab aae aan aao aat aau ab- aba abb abe abn abo abt abu aea aeb aee aen aeo aet aeu an- ana anb ane ann ano ant anu aoa aob aoe aon aoo aot aou at- ata atb ate atn ato att atu au- aua aub aue aun auo aut b-u baa bab bae ban bao bat bau bba bbb bbe bbn bbo bbt bbu be- bea beb bee ben beo bet beu bna bnb bne bnn bno bnt bnu boa bob boe bon boo bot bou bta btb bte btn bto btt btu bua bub bue bun buo but buu eaa eab eae ean eao eat eau eba ebb ebe ebn ebo ebt ebu eea eeb eee een eeo eet en- ena enb ene enn eno ent enu eo- eoa eob eoe eon eoo eot eou eta etb ete etn eto ett etu eu- eua eub eue eun eut naa nab nae nan nao nat nau nba nbb nbe nbn nbo nbt nbu ne- nea neb nee nen neo net neu nna nnb nne nnn nno nnt nnu no- noa nob noe non noo not nou nta ntb nte ntn nto ntt ntu nua nub nue nun nuo nut nuu oaa oab oae oan oao oat oau ob- oba obb obe obn obo obt obu oea oeb oee oen oeo oet on- ona onb one onn ono ont onu oo- ooa oob oon ooo oot ot- ota otb ote otn oto ott otu ou- oua oue oun ouo out taa tab tae tan tao tat tau tba tbb tbe tbn tbo tbt tbu te- tea teb tee ten teo tet teu tna tnb tne tnn tno tnt to- toa tob toe ton too tot tou tta ttb tte ttn tto ttt ttu tua tub tue tun tuo tut tuu ua- uaa uab uae uan uao uat uau uba ubb ube ubn ubo ubt ubu uea ueb uee uen uet un- una unb une unn uno unt unu uoa uob uoe uon uoo uot uta utb ute utn uto utt utu uua uue uun uut uuu