-er -ic c-- ccc ccd cce cci ccn ccr ccx cdc cdd cde cdi cdn cdr cdx ce- cec ced cee cei cen cer cex ci- cic cid cie cii cin cir cix cn- cnc cnd cne cni cnn cnr cnx crc crd cre cri crn crr crx cxc cxi cxr cxx dcc dcd dce dci dcn dcr dcx ddc ddd dde ddi ddn ddr ddx de- dec ded dee dei den der dex di- dic did die dii din dir dix dnc dnd dne dni dnn dnr drc drd dre dri drn drr drx dxc dxd dxi dxn dxr dxx ec- ecc ecd ece eci ecn ecr ecx ed- edc edd ede edi edn edr edx eec eed eee een eer eex eic eid eie eii ein eir eix en- enc end ene eni enn enr erc erd ere eri ern err ex- exc exd exe exi exr exx i-d icc icd ice ici icn icr idc idd ide idi idn idr idx ie- iec ied iee iei ien ier iex iic iid iie iii iin iir iix in- inc ind ine ini inn inr inx ir- irc ird ire iri irn irr irx ixc ixe ixi ixn n-i ncc ncd nce nci ncn ncr ncx ndc ndd nde ndi ndn ndr ne- nec ned nee nei nen ner nex nic nid nie nii nin nir nix nnc nne nni nnn nrc nrd nre nri nrn nrr nrx nxc nxd rcc rcd rce rci rcn rcr rcx rdc rdd rde rdi rdn rdr rdx re- rec red ree rei ren rer rex ric rid rie rii rin rir rix rnc rnd rni rnn rnr rrc rrd rri rrn rrr rxr xcd xci xcr xcx xdc xde xdi xdr xed xee xen xer xex xic xie xii xin xix xnc xrc xrd xrx xxi xxx