a-a a-b a-t aaa aab aae aak aao aat aau ab- aba abb abe abk abo abt abu aea aeb aee aek aeo aet aeu aka akb ake akk ako aku aoa aob aoe aok aoo aot aou at- ata atb ate ato att atu au- aua aub aue auk auo aut b-u baa bab bae bak bao bat bau bba bbb bbe bbk bbo bbt bbu be- bea beb bee bek beo bet beu bka bkb bke bkk bko bkt boa bob boe bok boo bot bou bta btb bte btk bto btt btu bua bub bue buk buo but buu eaa eab eae eak eao eat eau eba ebb ebe ebk ebo ebt ebu eea eeb eee eek eeo eet eka ekb eke eko ekt eku eo- eoa eob eoe eok eoo eot eou eta etb ete etk eto ett etu eu- eua eub eue eut k-t ka- kaa kab kae kak kao kat kau kba kbb kbe kbk kbo kbu ke- kea keb kee kek keo ket kkb kke kkk kkt kku koa kob koe kok koo kot kou kta ktb kte ktk kto ktt ktu kub kue kuk kut kuu oaa oab oae oak oao oat oau ob- oba obb obe obk obo obt obu oea oeb oee oeo oet oka okb oke okk oko oku oo- ooa oob ook ooo oot ot- ota otb ote otk oto ott otu ou- oua oue ouk ouo out taa tab tae tak tao tat tau tba tbb tbe tbk tbo tbt tbu te- tea teb tee tek teo tet teu tka tkb tke tkk tko tkt to- toa tob toe tok too tot tou tta ttb tte ttk tto ttt ttu tua tub tue tuk tuo tut tuu ua- uaa uab uae uak uao uat uau uba ubb ube ubk ubo ubt ubu uea ueb uee uet uka ukb uke ukk uku uoa uob uoe uok uoo uot uta utb ute utk uto utt utu uua uue uut uuu