-er -ic a-a a-c a-i aaa aac aad aae aai aak aar ac- aca acc acd ace aci ack acr ad- ada adc add ade adi adk adr aea aec aed aee aei aek aer ai- aia aic aid aie aii aik air aka akc akd ake aki akk akr ar- ara arc ard are ari ark arr c-- caa cac cad cae cai cak car cca ccc ccd cce cci cck ccr cda cdc cdd cde cdi cdk cdr ce- cea cec ced cee cei cek cer ci- cia cic cid cie cii cik cir cka ckc ckd cki cra crc crd cre cri crk crr daa dac dad dae dai dak dar dca dcc dcd dce dci dck dcr dda ddc ddd dde ddi ddk ddr de- dea dec ded dee dei dek der di- dia dic did die dii dik dir dka dkc dke dki dkk dkr dra drc drd dre dri drk drr eaa eac ead eae eai eak ear ec- eca ecc ecd ece eci eck ecr ed- eda edc edd ede edi edk edr eea eec eed eee eek eer eia eic eid eie eii eik eir eka ekc ekd eke eki ekr era erc erd ere eri erk err i-d ia- iaa iac iad iae iai iar ica icc icd ice ici ick icr ida idc idd ide idi idk idr ie- iea iec ied iee iei iek ier iia iic iid iie iii iir ika ikc ike iki ikk ikr ir- ira irc ird ire iri irk irr ka- kaa kac kad kae kai kak kar kca kcc kcd kce kci kck kcr kda kdc kde kdk kdr ke- kea kec ked kee kei kek ker kia kic kid kie kii kik kir kkc kke kki kkk kkr kra krc krd kri krk krr ra- raa rac rad rae rai rak rar rca rcc rcd rce rci rcr rda rdc rdd rde rdi rdr re- rea rec red ree rei rek rer ria ric rid rie rii rik rir rkc rke rkk rra rrc rrd rri rrk rrr