-th a-a a-b a-c a-t aaa aab aac aae aah aao aat ab- aba abb abc abe abh abo abt ac- aca acb acc ace ach aco act aea aeb aec aee aeh aeo aet aha ahb ahc ahe ahh aho aht aoa aob aoc aoe aoh aoo aot at- ata atb atc ate ath ato att baa bab bac bae bah bao bat bba bbb bbc bbe bbh bbo bbt bca bcb bcc bce bch bco bct be- bea beb bec bee beh beo bet bha bhb bhc bhe bhh bho bht boa bob boc boe boh boo bot bta btb btc bte bth bto btt c-- caa cab cac cae cah cao cat cba cbb cbc cbe cbh cbo cbt cca ccb ccc cce cch cco cct ce- cea ceb cec cee ceh ceo cet ch- cha chb chc che chh cho cht co- coa cob coc coe coh coo cot cta ctb ctc cte cth cto ctt eaa eab eac eae eah eao eat eba ebb ebc ebe ebh ebo ebt ec- eca ecb ecc ece ech eco ect eea eeb eec eee eeo eet eha ehb ehc ehe ehh eho eht eo- eoa eob eoc eoe eoh eoo eot eta etb etc ete eth eto ett haa hab hac hae hah hao hat hba hbb hbc hbe hbh hbo hbt hca hcb hcc hce hch hco hct he- hea heb hec hee heh heo het hha hhb hhc hhe hhh hho hht hoa hob hoc hoe hoh hoo hot hta htb htc hte hth hto htt oaa oab oac oae oah oao oat ob- oba obb obc obe obh obo obt oc- oca ocb occ och oco oct oea oeb oec oee oeh oeo oet oha ohc ohe ohh oho oht oo- ooa oob ooc ooh ooo oot ot- ota otb otc ote oth oto ott taa tab tac tae tah tao tat tba tbb tbc tbe tbh tbo tbt tca tcb tcc tce tch tco tct te- tea teb tec tee teh teo tet th- tha thb thc the thh tho tht to- toa tob toc toe toh too tot tta ttb ttc tte tth tto ttt