-er -ic a-a a-c a-i aaa aac aad aae aaf aai aak aar ac- aca acc acd ace acf aci ack acr ad- ada adc add ade adf adi adk adr aea aec aed aee aef aei aek aer af- afa afc afd afe aff afi afk afr ai- aia aic aid aie aif aii aik air aka akc akd ake aki akk akr ar- ara arc ard are arf ari ark arr c-- caa cac cad cae caf cai cak car cca ccc ccd cce ccf cci cck ccr cda cdc cdd cde cdf cdi cdk cdr ce- cea cec ced cee cef cei cek cer cfa cfc cfd cfe cff cfi cfk cfr ci- cia cic cid cie cif cii cik cir cka ckc ckd cki cra crc crd cre crf cri crk crr daa dac dad dae daf dai dak dar dca dcc dcd dce dcf dci dck dcr dda ddc ddd dde ddf ddi ddk ddr de- dea dec ded dee def dei dek der dfa dfc dfd dfe dff dfi dfk dfr di- dia dic did die dif dii dik dir dka dkc dke dki dkk dkr dra drc drd dre dri drk drr eaa eac ead eae eaf eai eak ear ec- eca ecc ecd ece ecf eci eck ecr ed- eda edc edd ede edf edi edk edr eea eec eed eee eef eek eer ef- efa efc efd efe eff efi efr eia eic eid eie eif eii eik eir eka ekc ekd eke ekf eki ekr era erc erd ere erf eri erk err faa fac fad fae faf fai fak far fca fcc fcd fce fcf fci fck fcr fda fdc fdd fde fdf fdi fdk fdr fea fec fed fee fef fei fek fer ffa ffc ffd ffe fff ffi ffk ffr fia fic fid fie fif fii fik fir fka fkc fkf fki fkk fra frc frd fre frf fri frk frr i-d i-f ia- iaa iac iad iae iaf iai iar ica icc icd ice icf ici ick icr ida idc idd ide idf idi idk idr ie- iea iec ied iee ief iei iek ier ifa ifc ifd ife iff ifi ifr iia iic iid iie iif iii iir ika ikc ike ikf iki ikk ikr ir- ira irc ird ire irf iri irk irr ka- kaa kac kad kae kaf kai kak kar kca kcc kcd kce kci kck kcr kda kdc kde kdf kdk kdr ke- kea kec ked kee kef kei kek ker kfa kfc kfd kff kfi kia kic kid kie kif kii kik kir kkc kke kki kkk kkr kra krc krd krf kri krk krr ra- raa rac rad rae raf rai rak rar rca rcc rcd rce rcf rci rcr rda rdc rdd rde rdf rdi rdr re- rea rec red ree ref rei rek rer rfa rfc rfd rfe rff rfi rfk rfr ria ric rid rie rif rii rik rir rkc rke rkf rkk rra rrc rrd rrf rri rrk rrr