-th a-a a-b a-c a-t aaa aab aac aag aah aao aar aat ab- aba abb abc abg abh abo abr abt ac- aca acb acc acg ach aco acr act ag- aga agb agc agg agh ago agr agt aha ahb ahc ahg ahh aho ahr aht aoa aob aoc aog aoh aoo aor aot ar- ara arb arc arg arh aro arr art at- ata atb atc atg ath ato atr att baa bab bac bag bah bao bar bat bba bbb bbc bbg bbh bbo bbr bbt bca bcb bcc bcg bch bco bcr bct bga bgb bgc bgg bgh bgo bgr bgt bha bhb bhc bhg bhh bho bhr bht boa bob boc bog boh boo bor bot bra brb brg brh bro brr brt bta btb btc btg bth bto btr btt c-- caa cab cac cag cah cao car cat cba cbb cbc cbg cbh cbo cbr cbt cca ccb ccc ccg cch cco ccr cct cga cgb cgc cgg cgh cgo cgr cgt ch- cha chb chc chg chh cho chr cht co- coa cob coc cog coh coo cor cot cra crb crc crg crh cro crr crt cta ctb ctc ctg cth cto ctr ctt gaa gab gac gag gah gao gar gat gba gbc gbg gbh gbo gbr gbt gca gcb gcc gcg gch gco gcr gct gga ggb ggc ggg ggh ggo ggr ggt gha ghb ghc ghg ghh gho ghr ght goa gob goc gog goh goo gor got gra grb grc grg grh gro grr grt gta gtb gtc gtg gth gto gtr gtt haa hab hac hag hah hao har hat hba hbb hbc hbg hbh hbo hbr hbt hca hcb hcc hcg hch hco hcr hct hga hgb hgc hgg hgh hgo hgr hgt hha hhb hhc hhg hhh hho hhr hht hoa hob hoc hog hoh hoo hor hot hr- hra hrb hrc hrg hrh hro hrr hrt hta htb htc htg hth hto htr htt oaa oab oac oag oah oao oar oat ob- oba obb obc obg obh obo obr obt oc- oca ocb occ ocg och oco ocr oct oga ogc ogg ogh ogo ogt oha ohc ohg ohh oho ohr oht oo- ooa oob ooc oog ooh ooo oor oot or- ora orb orc org orh oro orr ort ot- ota otb otc otg oth oto otr ott ra- raa rab rac rag rah rao rar rat rba rbb rbc rbg rbh rbo rbr rbt rca rcb rcc rcg rch rco rcr rct rga rgb rgc rgg rgh rgo rgr rgt rh- rha rhb rhc rhg rhh rho rhr rht roa rob roc rog roh roo ror rot rra rrb rrc rrg rrh rrr rrt rta rtb rtc rtg rto rtr rtt taa tab tac tag tah tao tar tat tba tbb tbc tbg tbh tbo tbr tbt tca tcb tcc tcg tch tco tcr tct tga tgb tgc tgg tgh tgo tgr tgt th- tha thb thc thg thh tho thr tht to- toa tob toc tog toh too tor tot tra trb trc trg trh tro trr trt tta ttb ttc ttg tth tto ttr ttt