a-a a-b a-c a-t aaa aab aac aag aan aao aat aau ab- aba abb abc abg abn abo abt abu ac- aca acb acc acg acn aco act acu ag- aga agb agc agg agn ago agt agu an- ana anb anc ang ann ano ant anu aoa aob aoc aog aon aoo aot aou at- ata atb atc atg atn ato att atu au- aua aub auc aug aun auo aut b-u baa bab bac bag ban bao bat bau bba bbb bbc bbg bbn bbo bbt bbu bca bcb bcc bcg bcn bco bct bcu bga bgb bgc bgg bgn bgo bgt bgu bna bnb bnc bng bnn bno bnt bnu boa bob boc bog bon boo bot bou bta btb btc btg btn bto btt btu bua bub buc bug bun buo but buu c-- caa cab cac cag can cao cat cau cba cbb cbc cbg cbn cbo cbt cbu cca ccb ccc ccg ccn cco cct ccu cga cgb cgc cgg cgn cgo cgt cgu cn- cna cnb cnc cng cnn cno cnt cnu co- coa cob coc cog con coo cot cou cta ctb ctc ctg ctn cto ctt ctu cua cub cuc cug cun cuo cut cuu gaa gab gac gag gan gao gat gau gba gbc gbg gbn gbo gbt gbu gca gcb gcc gcg gcn gco gct gcu gga ggb ggc ggg ggn ggo ggt ggu gna gnb gnc gnn gno gnt gnu goa gob goc gog gon goo got gou gta gtb gtc gtg gtn gto gtt gtu gu- gua gub guc gug gun guo gut guu naa nab nac nag nan nao nat nau nba nbb nbc nbg nbn nbo nbt nbu nca ncb ncc ncg ncn nco nct ncu nga ngb ngc ngg ngn ngo ngt ngu nna nnb nnc nng nnn nno nnt nnu no- noa nob noc nog non noo not nou nta ntb ntc ntg ntn nto ntt ntu nua nub nuc nug nun nuo nut nuu oaa oab oac oag oan oao oat oau ob- oba obb obc obg obn obo obt obu oc- oca ocb occ ocg ocn oco oct ocu oga ogc ogg ogn ogo ogt on- ona onb onc ong onn ono ont onu oo- ooa oob ooc oog oon ooo oot ot- ota otb otc otg otn oto ott otu ou- oua ouc oun ouo out taa tab tac tag tan tao tat tau tba tbb tbc tbg tbn tbo tbt tbu tca tcb tcc tcg tcn tco tct tcu tga tgb tgc tgg tgn tgo tgt tgu tna tnb tnc tng tnn tno tnt to- toa tob toc tog ton too tot tou tta ttb ttc ttg ttn tto ttt ttu tua tub tuc tug tun tuo tut tuu ua- uaa uab uac uag uan uao uat uau uba ubb ubc ubg ubn ubo ubt ubu uca ucb ucc ucg ucn uco uct ucu uga ugb ugc ugg ugn ugo ugt ugu un- una unb unc ung unn uno unt unu uoa uob uoc uog uon uoo uot uta utb utc utn uto utt utu uua uuc uug uun uut uuu