-er -ic a-a a-c a-i aaa aac aae aaf aai aan aao aar aas ac- aca acc ace acf aci acn aco acr acs aea aec aee aef aei aen aeo aer aes af- afa afc afe aff afi afn afo afr afs ai- aia aic aie aif aii ain aio air ais an- ana anc ane anf ani ann ano anr ans aoa aoc aoe aof aoi aon aoo aor aos ar- ara arc are arf ari arn aro arr ars as- asa asc ase asf asi asn aso asr ass c-- caa cac cae caf cai can cao car cas cca ccc cce ccf cci ccn cco ccr ccs ce- cea cec cee cef cei cen ceo cer ces cfa cfc cfe cff cfi cfn cfo cfr cfs ci- cia cic cie cif cii cin cio cir cis cn- cna cnc cne cnf cni cnn cno cnr cns co- coa coc coe cof coi con coo cor cos cra crc cre crf cri crn cro crr crs csa csc cse csf csi csn cso csr css eaa eac eae eaf eai ean eao ear eas ec- eca ecc ece ecf eci ecn eco ecr ecs eea eec eee eef een eeo eer ees ef- efa efc efe eff efi efo efr efs eia eic eie eif eii ein eio eir eis en- ena enc ene enf eni enn eno enr ens eo- eoa eoc eoe eof eoi eon eoo eor eos era erc ere erf eri ern ero err ers es- esa esc ese esf esi esn eso esr ess faa fac fae faf fai fan fao far fas fca fcc fce fcf fci fcn fco fcr fcs fea fec fee fef fei fen feo fer fes ffa ffc ffe fff ffi ffn ffo ffr ffs fia fic fie fif fii fin fir fis fna fnc fne fnf fni fnn fnr fns foa foc foe fof foi fon foo for fos fra frc fre frf fri frn fro frr frs fsa fsc fse fsf fsi fsn fso fsr fss i-f ia- iaa iac iae iaf iai ian iao iar ias ica icc ice icf ici icn ico icr ics ie- iea iec iee ief iei ien ier ies ifa ifc ife iff ifi ifn ifo ifr ifs iia iic iie iif iii iin iio iir iis in- ina inc ine inf ini inn ino inr ins io- ioa ioc ioe iof ioi ion ioo ior ios ir- ira irc ire irf iri irn iro irr irs is- isa isc ise isf isi isn iso isr iss n-i naa nac nae naf nai nan nao nar nas nca ncc nce ncf nci ncn nco ncr ncs ne- nea nec nee nef nei nen neo ner nes nfa nfc nfe nff nfi nfn nfo nfr nfs nia nic nie nif nii nin nio nir nis nna nnc nne nnf nni nnn nno nns no- noa noc noe nof noi non noo nor nos nra nrc nre nrf nri nrn nro nrr nrs nsa nsc nse nsf nsi nsn nso nsr nss o-i oaa oac oae oaf oai oan oao oar oas oc- oca occ ocf oci ocn oco ocr ocs oea oec oee oef oei oen oeo oer oes of- ofa ofc ofe off ofi ofn ofo ofr ofs oia oic oie oif oii oin oio oir ois on- ona onc one onf oni onn ono onr ons oo- ooa ooc oof ooi oon ooo oor oos or- ora orc ore orf ori orn oro orr ors os- osa osc ose osf osi osn oso osr oss ra- raa rac rae raf rai ran rao rar ras rca rcc rce rcf rci rcn rco rcr rcs re- rea rec ree ref rei ren reo rer res rfa rfc rfe rff rfi rfn rfo rfr rfs ria ric rie rif rii rin rio rir ris rna rnc rni rnn rno rnr rns roa roc roe rof roi ron roo ror ros rra rrc rrf rri rrn rrr rrs rsa rsc rse rsf rsi rsn rso rsr rss saa sac sae saf sai san sao sar sas sca scc sce scf sci scn sco scr scs se- sea sec see sef sei sen seo ser ses sfa sfc sfe sff sfi sfn sfo sfr sfs sia sic sie sif sii sin sio sir sis sna snc sne snf sni snn sno snr sns soa soc soe sof soi son soo sor sos sr- sra src sre srf sri srn sro srr srs ss- ssa ssc sse ssf ssi ssn sso ssr sss