-er a-a a-c aaa aac aae aah aak aap aar aas ac- aca acc ace ach ack acp acr acs aea aec aee aeh aek aep aer aes aha ahc ahe ahh ahk ahp ahr ahs aka akc ake akh akk akp akr aks ap- apa apc ape aph apk app apr aps ar- ara arc are arh ark arp arr ars as- asa asc ase ash ask asp asr ass c-- caa cac cae cah cak cap car cas cca ccc cce cch cck ccp ccr ccs ce- cea cec cee ceh cek cep cer ces ch- cha chc che chh chk chp chr chs cka ckc ckh cks cpa cpc cpe cph cpk cpp cpr cps cra crc cre crh crk crp crr crs csa csc cse csh csk csp csr css eaa eac eae eah eak eap ear eas ec- eca ecc ece ech eck ecr ecs eea eec eee eek eep eer ees eha ehc ehe ehh ehp ehr ehs eka ekc eke ekh ekp ekr eks ep- epa epc epe eph epp epr eps era erc ere erh erk erp err ers es- esa esc ese esh esk esp esr ess haa hac hae hah hak hap har has hca hcc hce hch hck hcp hcr hcs he- hea hec hee heh hek hep her hes hha hhc hhe hhh hhk hhp hhr hhs hka hkh hkk hkp hkr hks hpa hpc hpe hph hpk hpp hpr hps hr- hra hrc hre hrh hrk hrp hrr hrs hsa hsc hse hsh hsk hsp hsr hss ka- kaa kac kae kah kak kap kar kas kca kcc kce kch kck kcp kcr kcs ke- kea kec kee keh kek kep ker kes kha khe khh khk khr khs kkc kke kkh kkk kkp kkr kks kpa kpc kpe kph kpk kpp kpr kps kra krc krk krp krr krs ksa ksc kse ksh ksk ksp ksr kss p-p paa pac pae pah pak pap par pas pca pcc pce pch pck pcp pcr pcs pea pec pee peh pek pep per pes pha phc phe phk php phr phs pka pkc pke pkp pkr pks ppa ppc ppe pph ppk ppp ppr pps pra prc pre prh prk prp prr prs ps- psa psc pse psh psk psp psr pss ra- raa rac rae rah rak rap rar ras rca rcc rce rch rcp rcr rcs re- rea rec ree reh rek rep rer res rh- rha rhc rhe rhh rhp rhr rhs rkc rke rkk rkp rks rpa rpc rpe rph rpk rpp rpr rps rra rrc rrh rrk rrp rrr rrs rsa rsc rse rsh rsk rsp rsr rss saa sac sae sah sak sap sar sas sca scc sce sch sck scp scr scs se- sea sec see seh sek sep ser ses sh- sha shc she shh shk shp shr shs sk- ska skc ske skh skk skp skr sks spa spc spe sph spk spp spr sps sr- sra src sre srh srk srp srr srs ss- ssa ssc sse ssh ssk ssp ssr sss