-er -ic c-- ccc ccd cce cci cck ccn ccp ccr cdc cdd cde cdi cdk cdn cdp cdr ce- cec ced cee cei cek cen cep cer ci- cic cid cie cii cik cin cip cir ckc ckd cki cn- cnc cnd cne cni cnn cnp cnr cpc cpd cpe cpi cpk cpn cpp cpr crc crd cre cri crk crn crp crr dcc dcd dce dci dck dcn dcp dcr ddc ddd dde ddi ddk ddn ddp ddr de- dec ded dee dei dek den dep der di- dic did die dii dik din dip dir dkc dke dki dkk dkp dkr dnc dnd dne dni dnk dnn dnp dnr dpc dpd dpe dpi dpk dpn dpp dpr drc drd dre dri drk drn drp drr ec- ecc ecd ece eci eck ecn ecr ed- edc edd ede edi edk edn edp edr eec eed eee eek een eep eer eic eid eie eii eik ein eip eir ekc ekd eke eki ekp ekr en- enc end ene eni enk enn enp enr ep- epc epd epe epi epn epp epr erc erd ere eri erk ern erp err i-d icc icd ice ici ick icn icp icr idc idd ide idi idk idn idp idr ie- iec ied iee iei iek ien iep ier iic iid iie iii iin iip iir ikc ike iki ikk ikr in- inc ind ine ini ink inn inp inr ipc ipd ipe ipi ipn ipp ipr ir- irc ird ire iri irk irn irp irr kcc kcd kce kci kck kcn kcp kcr kdc kde kdk kdp kdr ke- kec ked kee kei kek ken kep ker kic kid kie kii kik kin kip kir kkc kke kki kkk kkn kkp kkr kn- knc knd kne kni knk knn knp knr kpc kpd kpe kpi kpk kpn kpp kpr krc krd kri krk krn krp krr n-i ncc ncd nce nci nck ncn ncp ncr ndc ndd nde ndi ndk ndn ndp ndr ne- nec ned nee nei nek nen nep ner nic nid nie nii nik nin nip nir nkc nke nki nkk nkn nkp nkr nnc nne nni nnk nnn nnp npc npd npe npi npn npp npr nrc nrd nre nri nrk nrn nrp nrr p-p pcc pcd pce pci pck pcn pcp pcr pdc pdd pde pdi pdk pdn pdp pdr pec ped pee pei pek pen pep per pic pid pie pii pik pin pip pir pkc pkd pke pki pkn pkp pkr pn- pnc pnd pne pni pnk pnn pnp pnr ppc ppd ppe ppi ppk ppn ppp ppr prc prd pre pri prk prn prp prr rcc rcd rce rci rcn rcp rcr rdc rdd rde rdi rdn rdp rdr re- rec red ree rei rek ren rep rer ric rid rie rii rik rin rip rir rkc rke rkk rkp rnc rnd rni rnn rnp rnr rpc rpd rpe rpi rpk rpn rpp rpr rrc rrd rri rrk rrn rrp rrr