-er -ic c-- ccc ccd cce cci ccn ccp ccr ccx cdc cdd cde cdi cdn cdp cdr cdx ce- cec ced cee cei cen cep cer cex ci- cic cid cie cii cin cip cir cix cn- cnc cnd cne cni cnn cnp cnr cnx cpc cpd cpe cpi cpn cpp cpr cpx crc crd cre cri crn crp crr crx cxc cxi cxp cxr cxx dcc dcd dce dci dcn dcp dcr dcx ddc ddd dde ddi ddn ddp ddr ddx de- dec ded dee dei den dep der dex di- dic did die dii din dip dir dix dnc dnd dne dni dnn dnp dnr dpc dpd dpe dpi dpn dpp dpr drc drd dre dri drn drp drr drx dxc dxd dxi dxn dxp dxr dxx ec- ecc ecd ece eci ecn ecr ecx ed- edc edd ede edi edn edp edr edx eec eed eee een eep eer eex eic eid eie eii ein eip eir eix en- enc end ene eni enn enp enr ep- epc epd epe epi epn epp epr epx erc erd ere eri ern erp err ex- exc exd exe exi exp exr exx i-d icc icd ice ici icn icp icr idc idd ide idi idn idp idr idx ie- iec ied iee iei ien iep ier iex iic iid iie iii iin iip iir iix in- inc ind ine ini inn inp inr inx ipc ipd ipe ipi ipn ipp ipr ipx ir- irc ird ire iri irn irp irr irx ixc ixe ixi ixn n-i ncc ncd nce nci ncn ncp ncr ncx ndc ndd nde ndi ndn ndp ndr ne- nec ned nee nei nen nep ner nex nic nid nie nii nin nip nir nix nnc nne nni nnn nnp npc npd npe npi npn npp npr nrc nrd nre nri nrn nrp nrr nrx nxc nxd p-p pcc pcd pce pci pcn pcp pcr pcx pdc pdd pde pdi pdn pdp pdr pdx pec ped pee pei pen pep per pex pic pid pie pii pin pip pir pix pn- pnc pnd pne pni pnn pnp pnr pnx ppc ppd ppe ppi ppn ppp ppr ppx prc prd pre pri prn prp prr prx pxc pxe pxr rcc rcd rce rci rcn rcp rcr rcx rdc rdd rde rdi rdn rdp rdr rdx re- rec red ree rei ren rep rer rex ric rid rie rii rin rip rir rix rnc rnd rni rnn rnp rnr rpc rpd rpe rpi rpn rpp rpr rpx rrc rrd rri rrn rrp rrr rxp rxr xcd xci xcp xcr xcx xdc xde xdi xdr xed xee xen xep xer xex xic xie xii xin xix xnc xpc xpd xpe xpn xpp xrc xrd xrx xxi xxp xxx