-er -ic c-- ccc ccd cce ccf ccg cci ccn ccr cdc cdd cde cdf cdg cdi cdn cdr ce- cec ced cee cef ceg cei cen cer cfc cfd cfe cff cfg cfi cfn cfr cgc cgd cge cgg cgi cgn cgr ci- cic cid cie cif cig cii cin cir cn- cnc cnd cne cnf cng cni cnn cnr crc crd cre crf crg cri crn crr dcc dcd dce dcf dcg dci dcn dcr ddc ddd dde ddf ddg ddi ddn ddr de- dec ded dee def deg dei den der dfc dfd dfe dff dfg dfi dfn dfr dgc dgd dge dgf dgg dgi dgn dgr di- dic did die dif dig dii din dir dnc dnd dne dnf dng dni dnn dnr drc drd dre drg dri drn drr ec- ecc ecd ece ecf ecg eci ecn ecr ed- edc edd ede edf edg edi edn edr eec eed eee eef eeg een eer ef- efc efd efe eff efg efi efr egc egd ege egf egg egi egn egr eic eid eie eif eig eii ein eir en- enc end ene enf eng eni enn enr erc erd ere erf erg eri ern err fcc fcd fce fcf fcg fci fcn fcr fdc fdd fde fdf fdg fdi fdn fdr fec fed fee fef feg fei fen fer ffc ffd ffe fff ffg ffi ffn ffr fgc fgd fge fgf fgg fgi fgn fgr fic fid fie fif fig fii fin fir fnc fnd fne fnf fng fni fnn fnr frc frd fre frf frg fri frn frr g-d gcc gcd gce gcf gcg gci gcn gcr gdc gdd gde gdf gdi gdn gdr ge- gec ged gee gef geg gei gen ger gfc gfd gfe gff gfi gfr ggc ggd ggg ggi ggn ggr gic gid gie gif gig gii gin gir gnc gnd gne gnf gni gnn gnr grc grd gre grf grg gri grn grr i-d i-f icc icd ice icf icg ici icn icr idc idd ide idf idg idi idn idr ie- iec ied iee ief ieg iei ien ier ifc ifd ife iff ifg ifi ifn ifr igc igd ige igf igg igi ign igr iic iid iie iif iii iin iir in- inc ind ine inf ing ini inn inr ir- irc ird ire irf irg iri irn irr n-i ncc ncd nce ncf ncg nci ncn ncr ndc ndd nde ndf ndg ndi ndn ndr ne- nec ned nee nef neg nei nen ner nfc nfd nfe nff nfi nfn nfr ngc ngd nge ngf ngg ngi ngn nic nid nie nif nig nii nin nir nnc nne nnf nng nni nnn nrc nrd nre nrf nrg nri nrn nrr rcc rcd rce rcf rcg rci rcn rcr rdc rdd rde rdf rdg rdi rdn rdr re- rec red ree ref reg rei ren rer rfc rfd rfe rff rfg rfi rfn rfr rgc rgd rge rgf rgg rgi rgn rgr ric rid rie rif rig rii rin rir rnc rnd rng rni rnn rnr rrc rrd rrf rrg rri rrn rrr