-th a-a a-b a-c a-t aaa aab aac aae aaf aah aan aat ab- aba abb abc abe abf abh abn abt ac- aca acb acc ace acf ach acn act aea aeb aec aee aef aeh aen aet af- afa afb afc afe aff afh afn aft aha ahb ahc ahe ahf ahh ahn aht an- ana anb anc ane anf anh ann ant at- ata atb atc ate atf ath atn att baa bab bac bae baf bah ban bat bba bbb bbc bbe bbf bbh bbn bbt bca bcb bcc bce bcf bch bcn bct be- bea beb bec bee bef beh ben bet bfa bfb bfc bfe bff bfh bfn bft bha bhb bhc bhe bhf bhh bht bna bnb bnc bne bnf bnn bnt bta btb btc bte btf bth btn btt c-- caa cab cac cae caf cah can cat cba cbb cbc cbe cbf cbh cbn cbt cca ccb ccc cce ccf cch ccn cct ce- cea ceb cec cee cef ceh cen cet cfa cfb cfc cfe cff cfh cfn cft ch- cha chb chc che chf chh chn cht cn- cna cnb cnc cne cnf cnh cnn cnt cta ctb ctc cte ctf cth ctn ctt eaa eab eac eae eaf eah ean eat eba ebb ebc ebe ebf ebh ebn ebt ec- eca ecb ecc ece ecf ech ecn ect eea eeb eec eee eef een eet ef- efa efb efc efe eff efh eft eha ehb ehc ehe ehf ehh ehn eht en- ena enb enc ene enf enh enn ent eta etb etc ete etf eth etn ett faa fab fac fae faf fah fan fat fba fbb fbc fbe fbf fbh fbn fbt fca fcb fcc fce fcf fcn fct fea feb fec fee fef feh fen fet ffa ffc ffe fff ffh ffn fft fha fhb fhc fhe fhf fhh fhn fna fnb fnc fne fnf fnh fnn fnt fta ftb ftc fte ftf fth ftn ftt haa hab hac hae haf hah han hat hba hbb hbc hbe hbf hbh hbn hbt hca hcb hcc hce hcf hch hcn hct he- hea heb hec hee hef heh hen het hfa hfb hfc hfe hff hfh hfn hft hha hhb hhc hhe hhf hhh hhn hht hna hnb hnc hne hnf hnh hnn hnt hta htb htc hte htf hth htn htt naa nab nac nae naf nah nan nat nba nbb nbc nbe nbf nbn nbt nca ncb ncc nce ncf nch ncn nct ne- nea neb nec nee nef neh nen net nfa nfb nfc nfe nff nfn nft nha nhb nhc nhe nhf nhh nhn nht nna nnb nnc nne nnf nnh nnn nnt nta ntb ntc nte ntf nth ntn ntt taa tab tac tae taf tah tan tat tba tbb tbc tbe tbf tbh tbn tbt tca tcb tcc tce tcf tch tcn tct te- tea teb tec tee tef teh ten tet tfa tfb tfc tfe tff tfh tfn tft th- tha thb thc the thf thh thn tht tna tnb tnc tne tnf tnh tnn tnt tta ttb ttc tte ttf tth ttn ttt