-er a-a a-c aaa aac aae aah aak aar aas ac- aca acc ace ach ack acr acs aea aec aee aeh aek aer aes aha ahc ahe ahh ahk ahr ahs aka akc ake akh akk akr aks ar- ara arc are arh ark arr ars as- asa asc ase ash ask asr ass c-- caa cac cae cah cak car cas cca ccc cce cch cck ccr ccs ce- cea cec cee ceh cek cer ces ch- cha chc che chh chk chr chs cka ckc ckh cks cra crc cre crh crk crr crs csa csc cse csh csk csr css eaa eac eae eah eak ear eas ec- eca ecc ece ech eck ecr ecs eea eec eee eek eer ees eha ehc ehe ehh ehr ehs eka ekc eke ekh ekr eks era erc ere erh erk err ers es- esa esc ese esh esk esr ess haa hac hae hah hak har has hca hcc hce hch hck hcr hcs he- hea hec hee heh hek her hes hha hhc hhe hhh hhk hhr hhs hka hkh hkk hkr hks hr- hra hrc hre hrh hrk hrr hrs hsa hsc hse hsh hsk hsr hss ka- kaa kac kae kah kak kar kas kca kcc kce kch kck kcr kcs ke- kea kec kee keh kek ker kes kha khe khh khk khr khs kkc kke kkh kkk kkr kks kra krc krk krr krs ksa ksc kse ksh ksk ksr kss ra- raa rac rae rah rak rar ras rca rcc rce rch rcr rcs re- rea rec ree reh rek rer res rh- rha rhc rhe rhh rhr rhs rkc rke rkk rks rra rrc rrh rrk rrr rrs rsa rsc rse rsh rsk rsr rss saa sac sae sah sak sar sas sca scc sce sch sck scr scs se- sea sec see seh sek ser ses sh- sha shc she shh shk shr shs sk- ska skc ske skh skk skr sks sr- sra src sre srh srk srr srs ss- ssa ssc sse ssh ssk ssr sss