-th a-a a-b a-c a-t aaa aab aac aae aag aah aan aat ab- aba abb abc abe abg abh abn abt ac- aca acb acc ace acg ach acn act aea aeb aec aee aeg aeh aen aet ag- aga agb agc age agg agh agn agt aha ahb ahc ahe ahg ahh ahn aht an- ana anb anc ane ang anh ann ant at- ata atb atc ate atg ath atn att baa bab bac bae bag bah ban bat bba bbb bbc bbe bbg bbh bbn bbt bca bcb bcc bce bcg bch bcn bct be- bea beb bec bee beg beh ben bet bga bgb bgc bge bgg bgh bgn bgt bha bhb bhc bhe bhg bhh bht bna bnb bnc bne bng bnn bnt bta btb btc bte btg bth btn btt c-- caa cab cac cae cag cah can cat cba cbb cbc cbe cbg cbh cbn cbt cca ccb ccc cce ccg cch ccn cct ce- cea ceb cec cee ceg ceh cen cet cga cgb cgc cge cgg cgh cgn cgt ch- cha chb chc che chg chh chn cht cn- cna cnb cnc cne cng cnh cnn cnt cta ctb ctc cte ctg cth ctn ctt eaa eab eac eae eag eah ean eat eba ebb ebc ebe ebg ebh ebn ebt ec- eca ecb ecc ece ecg ech ecn ect eea eeb eec eee eeg een eet ega egb egc ege egg egh egn egt eha ehb ehc ehe ehg ehh ehn eht en- ena enb enc ene eng enh enn ent eta etb etc ete etg eth etn ett gaa gab gac gae gag gah gan gat gba gbc gbe gbg gbh gbn gbt gca gcb gcc gce gcg gch gcn gct ge- gea geb gec gee geg geh gen get gga ggb ggc ggg ggh ggn ggt gha ghb ghc ghe ghg ghh ghn ght gna gnb gnc gne gnn gnt gta gtb gtc gte gtg gth gtn gtt haa hab hac hae hag hah han hat hba hbb hbc hbe hbg hbh hbn hbt hca hcb hcc hce hcg hch hcn hct he- hea heb hec hee heg heh hen het hga hgb hgc hge hgg hgh hgn hgt hha hhb hhc hhe hhg hhh hhn hht hna hnb hnc hne hng hnh hnn hnt hta htb htc hte htg hth htn htt naa nab nac nae nag nah nan nat nba nbb nbc nbe nbg nbn nbt nca ncb ncc nce ncg nch ncn nct ne- nea neb nec nee neg neh nen net nga ngb ngc nge ngg ngh ngn ngt nha nhb nhc nhe nhg nhh nhn nht nna nnb nnc nne nng nnh nnn nnt nta ntb ntc nte ntg nth ntn ntt taa tab tac tae tag tah tan tat tba tbb tbc tbe tbg tbh tbn tbt tca tcb tcc tce tcg tch tcn tct te- tea teb tec tee teg teh ten tet tga tgb tgc tge tgg tgh tgn tgt th- tha thb thc the thg thh thn tht tna tnb tnc tne tng tnh tnn tnt tta ttb ttc tte ttg tth ttn ttt