-er a-a a-c aaa aac aae aah aap aar aas ac- aca acc ace ach acp acr acs aea aec aee aeh aep aer aes aha ahc ahe ahh ahp ahr ahs ap- apa apc ape aph app apr aps ar- ara arc are arh arp arr ars as- asa asc ase ash asp asr ass c-- caa cac cae cah cap car cas cca ccc cce cch ccp ccr ccs ce- cea cec cee ceh cep cer ces ch- cha chc che chh chp chr chs cpa cpc cpe cph cpp cpr cps cra crc cre crh crp crr crs csa csc cse csh csp csr css eaa eac eae eah eap ear eas ec- eca ecc ece ech ecr ecs eea eec eee eep eer ees eha ehc ehe ehh ehp ehr ehs ep- epa epc epe eph epp epr eps era erc ere erh erp err ers es- esa esc ese esh esp esr ess haa hac hae hah hap har has hca hcc hce hch hcp hcr hcs he- hea hec hee heh hep her hes hha hhc hhe hhh hhp hhr hhs hpa hpc hpe hph hpp hpr hps hr- hra hrc hre hrh hrp hrr hrs hsa hsc hse hsh hsp hsr hss p-p paa pac pae pah pap par pas pca pcc pce pch pcp pcr pcs pea pec pee peh pep per pes pha phc phe php phr phs ppa ppc ppe pph ppp ppr pps pra prc pre prh prp prr prs ps- psa psc pse psh psp psr pss ra- raa rac rae rah rap rar ras rca rcc rce rch rcp rcr rcs re- rea rec ree reh rep rer res rh- rha rhc rhe rhh rhp rhr rhs rpa rpc rpe rph rpp rpr rps rra rrc rrh rrp rrr rrs rsa rsc rse rsh rsp rsr rss saa sac sae sah sap sar sas sca scc sce sch scp scr scs se- sea sec see seh sep ser ses sh- sha shc she shh shp shr shs spa spc spe sph spp spr sps sr- sra src sre srh srp srr srs ss- ssa ssc sse ssh ssp ssr sss