a-a a-c aaa aac aae aah aak aao ac- aca acc ace ach ack aco aea aec aee aeh aek aeo aha ahc ahe ahh ahk aho aka akc ake akh akk ako aoa aoc aoe aoh aok aoo c-- caa cac cae cah cak cao cca ccc cce cch cck cco ce- cea cec cee ceh cek ceo ch- cha chc che chh chk cho cka ckc ckh cko co- coa coc coe coh cok coo eaa eac eae eah eak eao ec- eca ecc ece ech eck eco eea eec eee eek eeo eha ehc ehe ehh eho eka ekc eke ekh eko eo- eoa eoc eoe eoh eok eoo haa hac hae hah hak hao hca hcc hce hch hck hco he- hea hec hee heh hek heo hha hhc hhe hhh hhk hho hka hkh hkk hko hoa hoc hoe hoh hok hoo ka- kaa kac kae kah kak kao kca kcc kce kch kck ke- kea kec kee keh kek keo kha khe khh khk kho kkc kke kkh kkk koa koc koe koh kok koo oaa oac oae oah oak oao oc- oca occ och ock oco oea oec oee oeh oeo oha ohc ohe ohh oho oka okc oke okk oko oo- ooa ooc ooh ook ooo