-er -ic a-a a-c a-i aaa aac aae aai aao aap aar aas ac- aca acc ace aci aco acp acr acs aea aec aee aei aeo aep aer aes ai- aia aic aie aii aio aip air ais aoa aoc aoe aoi aoo aop aor aos ap- apa apc ape api apo app apr aps ar- ara arc are ari aro arp arr ars as- asa asc ase asi aso asp asr ass c-- caa cac cae cai cao cap car cas cca ccc cce cci cco ccp ccr ccs ce- cea cec cee cei ceo cep cer ces ci- cia cic cie cii cio cip cir cis co- coa coc coe coi coo cop cor cos cpa cpc cpe cpi cpo cpp cpr cps cra crc cre cri cro crp crr crs csa csc cse csi cso csp csr css eaa eac eae eai eao eap ear eas ec- eca ecc ece eci eco ecr ecs eea eec eee eeo eep eer ees eia eic eie eii eio eip eir eis eo- eoa eoc eoe eoi eoo eop eor eos ep- epa epc epe epi epo epp epr eps era erc ere eri ero erp err ers es- esa esc ese esi eso esp esr ess ia- iaa iac iae iai iao iap iar ias ica icc ice ici ico icp icr ics ie- iea iec iee iei iep ier ies iia iic iie iii iio iip iir iis io- ioa ioc ioe ioi ioo iop ior ios ipa ipc ipe ipi ipo ipp ipr ips ir- ira irc ire iri iro irp irr irs is- isa isc ise isi iso isp isr iss o-i oaa oac oae oai oao oap oar oas oc- oca occ oci oco ocp ocr ocs oea oec oee oei oeo oep oer oes oia oic oie oii oio oip oir ois oo- ooa ooc ooi ooo oop oor oos op- opa opc ope opi opo opp opr ops or- ora orc ore ori oro orp orr ors os- osa osc ose osi oso osp osr oss p-p paa pac pae pai pao pap par pas pca pcc pce pci pco pcp pcr pcs pea pec pee pei peo pep per pes pia pic pie pii pio pip pir pis poa poc poe poi poo pop por pos ppa ppc ppe ppi ppo ppp ppr pps pra prc pre pri pro prp prr prs ps- psa psc pse psi pso psp psr pss ra- raa rac rae rai rao rap rar ras rca rcc rce rci rco rcp rcr rcs re- rea rec ree rei reo rep rer res ria ric rie rii rio rip rir ris roa roc roe roi roo rop ror ros rpa rpc rpe rpi rpo rpp rpr rps rra rrc rri rrp rrr rrs rsa rsc rse rsi rso rsp rsr rss saa sac sae sai sao sap sar sas sca scc sce sci sco scp scr scs se- sea sec see sei seo sep ser ses sia sic sie sii sio sip sir sis soa soc soe soi soo sop sor sos spa spc spe spi spo spp spr sps sr- sra src sre sri sro srp srr srs ss- ssa ssc sse ssi sso ssp ssr sss