a-a a-c aaa aac aae aag aah aak aao ac- aca acc ace acg ach ack aco aea aec aee aeg aeh aek aeo ag- aga agc age agg agh agk ago aha ahc ahe ahg ahh ahk aho aka akc ake akg akh akk ako aoa aoc aoe aog aoh aok aoo c-- caa cac cae cag cah cak cao cca ccc cce ccg cch cck cco ce- cea cec cee ceg ceh cek ceo cga cgc cge cgg cgh cgo ch- cha chc che chg chh chk cho cka ckc ckh cko co- coa coc coe cog coh cok coo eaa eac eae eag eah eak eao ec- eca ecc ece ecg ech eck eco eea eec eee eeg eek eeo ega egc ege egg egh ego eha ehc ehe ehg ehh eho eka ekc eke ekg ekh eko eo- eoa eoc eoe eog eoh eok eoo gaa gac gae gag gah gak gao gca gcc gce gcg gch gck gco ge- gea gec gee geg geh gek geo gga ggc ggg ggh ggo gha ghc ghe ghg ghh gho gka gkh gko goa goc goe gog goh gok goo haa hac hae hag hah hak hao hca hcc hce hcg hch hck hco he- hea hec hee heg heh hek heo hga hgc hge hgg hgh hgk hgo hha hhc hhe hhg hhh hhk hho hka hkg hkh hkk hko hoa hoc hoe hog hoh hok hoo ka- kaa kac kae kag kah kak kao kca kcc kce kcg kch kck ke- kea kec kee keg keh kek keo kga kgc kgh kgo kha khe khh khk kho kkc kke kkh kkk koa koc koe kog koh kok koo oaa oac oae oag oah oak oao oc- oca occ ocg och ock oco oea oec oee oeg oeh oeo oga ogc oge ogg ogh ogo oha ohc ohe ohg ohh oho oka okc oke okg okk oko oo- ooa ooc oog ooh ook ooo