-er -ic a-a a-c a-i aaa aac aad aae aai aap aar ac- aca acc acd ace aci acp acr ad- ada adc add ade adi adp adr aea aec aed aee aei aep aer ai- aia aic aid aie aii aip air ap- apa apc apd ape api app apr ar- ara arc ard are ari arp arr c-- caa cac cad cae cai cap car cca ccc ccd cce cci ccp ccr cda cdc cdd cde cdi cdp cdr ce- cea cec ced cee cei cep cer ci- cia cic cid cie cii cip cir cpa cpc cpd cpe cpi cpp cpr cra crc crd cre cri crp crr daa dac dad dae dai dap dar dca dcc dcd dce dci dcp dcr dda ddc ddd dde ddi ddp ddr de- dea dec ded dee dei dep der di- dia dic did die dii dip dir dpa dpc dpd dpe dpi dpp dpr dra drc drd dre dri drp drr eaa eac ead eae eai eap ear ec- eca ecc ecd ece eci ecr ed- eda edc edd ede edi edp edr eea eec eed eee eep eer eia eic eid eie eii eip eir ep- epa epc epd epe epi epp epr era erc erd ere eri erp err i-d ia- iaa iac iad iae iai iap iar ica icc icd ice ici icp icr ida idc idd ide idi idp idr ie- iea iec ied iee iei iep ier iia iic iid iie iii iip iir ipa ipc ipd ipe ipi ipp ipr ir- ira irc ird ire iri irp irr p-p paa pac pad pae pai pap par pca pcc pcd pce pci pcp pcr pda pdc pdd pde pdi pdp pdr pea pec ped pee pei pep per pia pic pid pie pii pip pir ppa ppc ppd ppe ppi ppp ppr pra prc prd pre pri prp prr ra- raa rac rad rae rai rap rar rca rcc rcd rce rci rcp rcr rda rdc rdd rde rdi rdp rdr re- rea rec red ree rei rep rer ria ric rid rie rii rip rir rpa rpc rpd rpe rpi rpp rpr rra rrc rrd rri rrp rrr