-er a-a a-c aaa aac aae aaf aah aar aas ac- aca acc ace acf ach acr acs aea aec aee aef aeh aer aes af- afa afc afe aff afh afr afs aha ahc ahe ahf ahh ahr ahs ar- ara arc are arf arh arr ars as- asa asc ase asf ash asr ass c-- caa cac cae caf cah car cas cca ccc cce ccf cch ccr ccs ce- cea cec cee cef ceh cer ces cfa cfc cfe cff cfh cfr cfs ch- cha chc che chf chh chr chs cra crc cre crf crh crr crs csa csc cse csf csh csr css eaa eac eae eaf eah ear eas ec- eca ecc ece ecf ech ecr ecs eea eec eee eef eer ees ef- efa efc efe eff efh efr efs eha ehc ehe ehf ehh ehr ehs era erc ere erf erh err ers es- esa esc ese esf esh esr ess faa fac fae faf fah far fas fca fcc fce fcf fcr fcs fea fec fee fef feh fer fes ffa ffc ffe fff ffh ffr ffs fha fhc fhe fhf fhh fhr fhs fra frc fre frf frh frr frs fsa fsc fse fsf fsh fsr fss haa hac hae haf hah har has hca hcc hce hcf hch hcr hcs he- hea hec hee hef heh her hes hfa hfc hfe hff hfh hfr hfs hha hhc hhe hhf hhh hhr hhs hr- hra hrc hre hrf hrh hrr hrs hsa hsc hse hsf hsh hsr hss ra- raa rac rae raf rah rar ras rca rcc rce rcf rch rcr rcs re- rea rec ree ref reh rer res rfa rfc rfe rff rfh rfr rfs rh- rha rhc rhe rhf rhh rhr rhs rra rrc rrf rrh rrr rrs rsa rsc rse rsf rsh rsr rss saa sac sae saf sah sar sas sca scc sce scf sch scr scs se- sea sec see sef seh ser ses sfa sfc sfe sff sfh sfr sfs sh- sha shc she shf shh shr shs sr- sra src sre srf srh srr srs ss- ssa ssc sse ssf ssh ssr sss