-er -ic a-a a-c a-i aaa aac aae aai aao aar aas ac- aca acc ace aci aco acr acs aea aec aee aei aeo aer aes ai- aia aic aie aii aio air ais aoa aoc aoe aoi aoo aor aos ar- ara arc are ari aro arr ars as- asa asc ase asi aso asr ass c-- caa cac cae cai cao car cas cca ccc cce cci cco ccr ccs ce- cea cec cee cei ceo cer ces ci- cia cic cie cii cio cir cis co- coa coc coe coi coo cor cos cra crc cre cri cro crr crs csa csc cse csi cso csr css eaa eac eae eai eao ear eas ec- eca ecc ece eci eco ecr ecs eea eec eee eeo eer ees eia eic eie eii eio eir eis eo- eoa eoc eoe eoi eoo eor eos era erc ere eri ero err ers es- esa esc ese esi eso esr ess ia- iaa iac iae iai iao iar ias ica icc ice ici ico icr ics ie- iea iec iee iei ier ies iia iic iie iii iio iir iis io- ioa ioc ioe ioi ioo ior ios ir- ira irc ire iri iro irr irs is- isa isc ise isi iso isr iss o-i oaa oac oae oai oao oar oas oc- oca occ oci oco ocr ocs oea oec oee oei oeo oer oes oia oic oie oii oio oir ois oo- ooa ooc ooi ooo oor oos or- ora orc ore ori oro orr ors os- osa osc ose osi oso osr oss ra- raa rac rae rai rao rar ras rca rcc rce rci rco rcr rcs re- rea rec ree rei reo rer res ria ric rie rii rio rir ris roa roc roe roi roo ror ros rra rrc rri rrr rrs rsa rsc rse rsi rso rsr rss saa sac sae sai sao sar sas sca scc sce sci sco scr scs se- sea sec see sei seo ser ses sia sic sie sii sio sir sis soa soc soe soi soo sor sos sr- sra src sre sri sro srr srs ss- ssa ssc sse ssi sso ssr sss