-th a-a a-b a-c a-t aaa aab aac aae aaf aah aan aao aat ab- aba abb abc abe abf abh abn abo abt ac- aca acb acc ace acf ach acn aco act aea aeb aec aee aef aeh aen aeo aet af- afa afb afc afe aff afh afn afo aft aha ahb ahc ahe ahf ahh ahn aho aht an- ana anb anc ane anf anh ann ano ant aoa aob aoc aoe aof aoh aon aoo aot at- ata atb atc ate atf ath atn ato att baa bab bac bae baf bah ban bao bat bba bbb bbc bbe bbf bbh bbn bbo bbt bca bcb bcc bce bcf bch bcn bco bct be- bea beb bec bee bef beh ben beo bet bfa bfb bfc bfe bff bfh bfn bfo bft bha bhb bhc bhe bhf bhh bho bht bna bnb bnc bne bnf bnn bno bnt boa bob boc boe bof boh bon boo bot bta btb btc bte btf bth btn bto btt c-- caa cab cac cae caf cah can cao cat cba cbb cbc cbe cbf cbh cbn cbo cbt cca ccb ccc cce ccf cch ccn cco cct ce- cea ceb cec cee cef ceh cen ceo cet cfa cfb cfc cfe cff cfh cfn cfo cft ch- cha chb chc che chf chh chn cho cht cn- cna cnb cnc cne cnf cnh cnn cno cnt co- coa cob coc coe cof coh con coo cot cta ctb ctc cte ctf cth ctn cto ctt eaa eab eac eae eaf eah ean eao eat eba ebb ebc ebe ebf ebh ebn ebo ebt ec- eca ecb ecc ece ecf ech ecn eco ect eea eeb eec eee eef een eeo eet ef- efa efb efc efe eff efh efo eft eha ehb ehc ehe ehf ehh ehn eho eht en- ena enb enc ene enf enh enn eno ent eo- eoa eob eoc eoe eof eoh eon eoo eot eta etb etc ete etf eth etn eto ett faa fab fac fae faf fah fan fao fat fba fbb fbc fbe fbf fbh fbn fbo fbt fca fcb fcc fce fcf fcn fco fct fea feb fec fee fef feh fen feo fet ffa ffc ffe fff ffh ffn ffo fft fha fhb fhc fhe fhf fhh fhn fho fna fnb fnc fne fnf fnh fnn fnt foa fob foc foe fof foh fon foo fot fta ftb ftc fte ftf fth ftn fto ftt haa hab hac hae haf hah han hao hat hba hbb hbc hbe hbf hbh hbn hbo hbt hca hcb hcc hce hcf hch hcn hco hct he- hea heb hec hee hef heh hen heo het hfa hfb hfc hfe hff hfh hfn hfo hft hha hhb hhc hhe hhf hhh hhn hho hht hna hnb hnc hne hnf hnh hnn hno hnt hoa hob hoc hoe hof hoh hon hoo hot hta htb htc hte htf hth htn hto htt naa nab nac nae naf nah nan nao nat nba nbb nbc nbe nbf nbn nbo nbt nca ncb ncc nce ncf nch ncn nco nct ne- nea neb nec nee nef neh nen neo net nfa nfb nfc nfe nff nfn nfo nft nha nhb nhc nhe nhf nhh nhn nht nna nnb nnc nne nnf nnh nnn nno nnt no- noa nob noc noe nof noh non noo not nta ntb ntc nte ntf nth ntn nto ntt oaa oab oac oae oaf oah oan oao oat ob- oba obb obc obe obf obh obn obo obt oc- oca ocb occ ocf och ocn oco oct oea oeb oec oee oef oeh oen oeo oet of- ofa ofb ofc ofe off ofn ofo oft oha ohc ohe ohf ohh ohn oho oht on- ona onb onc one onf onh onn ono ont oo- ooa oob ooc oof ooh oon ooo oot ot- ota otb otc ote otf oth otn oto ott taa tab tac tae taf tah tan tao tat tba tbb tbc tbe tbf tbh tbn tbo tbt tca tcb tcc tce tcf tch tcn tco tct te- tea teb tec tee tef teh ten teo tet tfa tfb tfc tfe tff tfh tfn tfo tft th- tha thb thc the thf thh thn tho tht tna tnb tnc tne tnf tnh tnn tno tnt to- toa tob toc toe tof toh ton too tot tta ttb ttc tte ttf tth ttn tto ttt