-er -ic a-a a-c a-i aaa aac aae aaf aai aao aar aas ac- aca acc ace acf aci aco acr acs aea aec aee aef aei aeo aer aes af- afa afc afe aff afi afo afr afs ai- aia aic aie aif aii aio air ais aoa aoc aoe aof aoi aoo aor aos ar- ara arc are arf ari aro arr ars as- asa asc ase asf asi aso asr ass c-- caa cac cae caf cai cao car cas cca ccc cce ccf cci cco ccr ccs ce- cea cec cee cef cei ceo cer ces cfa cfc cfe cff cfi cfo cfr cfs ci- cia cic cie cif cii cio cir cis co- coa coc coe cof coi coo cor cos cra crc cre crf cri cro crr crs csa csc cse csf csi cso csr css eaa eac eae eaf eai eao ear eas ec- eca ecc ece ecf eci eco ecr ecs eea eec eee eef eeo eer ees ef- efa efc efe eff efi efo efr efs eia eic eie eif eii eio eir eis eo- eoa eoc eoe eof eoi eoo eor eos era erc ere erf eri ero err ers es- esa esc ese esf esi eso esr ess faa fac fae faf fai fao far fas fca fcc fce fcf fci fco fcr fcs fea fec fee fef fei feo fer fes ffa ffc ffe fff ffi ffo ffr ffs fia fic fie fif fii fir fis foa foc foe fof foi foo for fos fra frc fre frf fri fro frr frs fsa fsc fse fsf fsi fso fsr fss i-f ia- iaa iac iae iaf iai iao iar ias ica icc ice icf ici ico icr ics ie- iea iec iee ief iei ier ies ifa ifc ife iff ifi ifo ifr ifs iia iic iie iif iii iio iir iis io- ioa ioc ioe iof ioi ioo ior ios ir- ira irc ire irf iri iro irr irs is- isa isc ise isf isi iso isr iss o-i oaa oac oae oaf oai oao oar oas oc- oca occ ocf oci oco ocr ocs oea oec oee oef oei oeo oer oes of- ofa ofc ofe off ofi ofo ofr ofs oia oic oie oif oii oio oir ois oo- ooa ooc oof ooi ooo oor oos or- ora orc ore orf ori oro orr ors os- osa osc ose osf osi oso osr oss ra- raa rac rae raf rai rao rar ras rca rcc rce rcf rci rco rcr rcs re- rea rec ree ref rei reo rer res rfa rfc rfe rff rfi rfo rfr rfs ria ric rie rif rii rio rir ris roa roc roe rof roi roo ror ros rra rrc rrf rri rrr rrs rsa rsc rse rsf rsi rso rsr rss saa sac sae saf sai sao sar sas sca scc sce scf sci sco scr scs se- sea sec see sef sei seo ser ses sfa sfc sfe sff sfi sfo sfr sfs sia sic sie sif sii sio sir sis soa soc soe sof soi soo sor sos sr- sra src sre srf sri sro srr srs ss- ssa ssc sse ssf ssi sso ssr sss