a-a a-c aaa aac aae aah aak aao aas ac- aca acc ace ach ack aco acs aea aec aee aeh aek aeo aes aha ahc ahe ahh ahk aho ahs aka akc ake akh akk ako aks aoa aoc aoe aoh aok aoo aos as- asa asc ase ash ask aso ass c-- caa cac cae cah cak cao cas cca ccc cce cch cck cco ccs ce- cea cec cee ceh cek ceo ces ch- cha chc che chh chk cho chs cka ckc ckh cko cks co- coa coc coe coh cok coo cos csa csc cse csh csk cso css eaa eac eae eah eak eao eas ec- eca ecc ece ech eck eco ecs eea eec eee eek eeo ees eha ehc ehe ehh eho ehs eka ekc eke ekh eko eks eo- eoa eoc eoe eoh eok eoo eos es- esa esc ese esh esk eso ess haa hac hae hah hak hao has hca hcc hce hch hck hco hcs he- hea hec hee heh hek heo hes hha hhc hhe hhh hhk hho hhs hka hkh hkk hko hks hoa hoc hoe hoh hok hoo hos hsa hsc hse hsh hsk hss ka- kaa kac kae kah kak kao kas kca kcc kce kch kck kcs ke- kea kec kee keh kek keo kes kha khe khh khk kho khs kkc kke kkh kkk kks koa koc koe koh kok koo kos ksa ksc kse ksh ksk kso kss oaa oac oae oah oak oao oas oc- oca occ och ock oco ocs oea oec oee oeh oeo oes oha ohc ohe ohh oho ohs oka okc oke okk oko oks oo- ooa ooc ooh ook ooo oos os- osa osc ose osh osk oso oss saa sac sae sah sak sao sas sca scc sce sch sck sco scs se- sea sec see seh sek seo ses sh- sha shc she shh shk sho shs sk- ska skc ske skh skk sko sks soa soc soe soh sok soo sos ss- ssa ssc sse ssh ssk sso sss