-er -ic a-a a-c a-i aaa aac aad aae aaf aai aak aar aas ac- aca acc acd ace acf aci ack acr acs ad- ada adc add ade adf adi adk adr ads aea aec aed aee aef aei aek aer aes af- afa afc afd afe aff afi afk afr afs ai- aia aic aid aie aif aii aik air ais aka akc akd ake aki akk akr aks ar- ara arc ard are arf ari ark arr ars as- asa asc asd ase asf asi ask asr ass c-- caa cac cad cae caf cai cak car cas cca ccc ccd cce ccf cci cck ccr ccs cda cdc cdd cde cdf cdi cdk cdr cds ce- cea cec ced cee cef cei cek cer ces cfa cfc cfd cfe cff cfi cfk cfr cfs ci- cia cic cid cie cif cii cik cir cis cka ckc ckd cki cks cra crc crd cre crf cri crk crr crs csa csc csd cse csf csi csk csr css daa dac dad dae daf dai dak dar das dca dcc dcd dce dcf dci dck dcr dcs dda ddc ddd dde ddf ddi ddk ddr dds de- dea dec ded dee def dei dek der des dfa dfc dfd dfe dff dfi dfk dfr dfs di- dia dic did die dif dii dik dir dis dka dkc dke dki dkk dkr dks dra drc drd dre dri drk drr drs dsa dsc dsd dse dsf dsi dsk dsr dss eaa eac ead eae eaf eai eak ear eas ec- eca ecc ecd ece ecf eci eck ecr ecs ed- eda edc edd ede edf edi edk edr eds eea eec eed eee eef eek eer ees ef- efa efc efd efe eff efi efr efs eia eic eid eie eif eii eik eir eis eka ekc ekd eke ekf eki ekr eks era erc erd ere erf eri erk err ers es- esa esc esd ese esf esi esk esr ess faa fac fad fae faf fai fak far fas fca fcc fcd fce fcf fci fck fcr fcs fda fdc fdd fde fdf fdi fdk fdr fds fea fec fed fee fef fei fek fer fes ffa ffc ffd ffe fff ffi ffk ffr ffs fia fic fid fie fif fii fik fir fis fka fkc fkf fki fkk fra frc frd fre frf fri frk frr frs fsa fsc fsd fse fsf fsi fsk fsr fss i-d i-f ia- iaa iac iad iae iaf iai iar ias ica icc icd ice icf ici ick icr ics ida idc idd ide idf idi idk idr ids ie- iea iec ied iee ief iei iek ier ies ifa ifc ifd ife iff ifi ifr ifs iia iic iid iie iif iii iir iis ika ikc ike ikf iki ikk ikr iks ir- ira irc ird ire irf iri irk irr irs is- isa isc isd ise isf isi isk isr iss ka- kaa kac kad kae kaf kai kak kar kas kca kcc kcd kce kci kck kcr kcs kda kdc kde kdf kdk kdr kds ke- kea kec ked kee kef kei kek ker kes kfa kfc kfd kff kfi kfs kia kic kid kie kif kii kik kir kis kkc kke kki kkk kkr kks kra krc krd krf kri krk krr krs ksa ksc ksd kse ksf ksi ksk ksr kss ra- raa rac rad rae raf rai rak rar ras rca rcc rcd rce rcf rci rcr rcs rda rdc rdd rde rdf rdi rdr rds re- rea rec red ree ref rei rek rer res rfa rfc rfd rfe rff rfi rfk rfr rfs ria ric rid rie rif rii rik rir ris rkc rke rkf rkk rks rra rrc rrd rrf rri rrk rrr rrs rsa rsc rsd rse rsf rsi rsk rsr rss saa sac sad sae saf sai sak sar sas sca scc scd sce scf sci sck scr scs sda sdc sdd sde sdf sdi sdk sdr sds se- sea sec sed see sef sei sek ser ses sfa sfc sfd sfe sff sfi sfk sfr sfs sia sic sid sie sif sii sik sir sis sk- ska skc skd ske skf ski skk skr sks sr- sra src srd sre srf sri srk srr srs ss- ssa ssc ssd sse ssf ssi ssk ssr sss