a-a a-c aaa aac aae aak aam aao aas ac- aca acc ace ack acm aco acs aea aec aee aek aem aeo aes aka akc ake akk akm ako aks ama amc ame amk amm amo ams aoa aoc aoe aok aom aoo aos as- asa asc ase ask asm aso ass c-- caa cac cae cak cam cao cas cca ccc cce cck ccm cco ccs ce- cea cec cee cek cem ceo ces cka ckc ckm cko cks cma cmc cme cmk cmm cmo cms co- coa coc coe cok com coo cos csa csc cse csk csm cso css eaa eac eae eak eam eao eas ec- eca ecc ece eck ecm eco ecs eea eec eee eek eem eeo ees eka ekc eke eko eks em- ema emc eme emk emm emo ems eo- eoa eoc eoe eok eom eoo eos es- esa esc ese esk esm eso ess ka- kaa kac kae kak kam kao kas kca kcc kce kck kcm kcs ke- kea kec kee kek kem keo kes kkc kke kkk kkm kks kma kmc kme kmk kmm kmo kms koa koc koe kok kom koo kos ksa ksc kse ksk ksm kso kss m-o maa mac mae mak mam mao mas mc- mca mcc mce mck mcm mco mcs mea mec mee mek mem meo mes mka mkc mke mkk mkm mko mks mma mmc mme mmk mmm mmo mms moa moc moe mok mom moo mos msa msc mse msk msm mso mss oaa oac oae oak oam oao oas oc- oca occ ock ocm oco ocs oea oec oee oem oeo oes oka okc oke okk oko oks om- oma omc ome omm omo oms oo- ooa ooc ook oom ooo oos os- osa osc ose osk osm oso oss saa sac sae sak sam sao sas sca scc sce sck scm sco scs se- sea sec see sek sem seo ses sk- ska skc ske skk skm sko sks sma smc sme smk smm smo sms soa soc soe sok som soo sos ss- ssa ssc sse ssk ssm sso sss