-er -ic c-- ccc ccd cce ccg cci cck ccn ccr cdc cdd cde cdg cdi cdk cdn cdr ce- cec ced cee ceg cei cek cen cer cgc cgd cge cgg cgi cgn cgr ci- cic cid cie cig cii cik cin cir ckc ckd cki cn- cnc cnd cne cng cni cnn cnr crc crd cre crg cri crk crn crr dcc dcd dce dcg dci dck dcn dcr ddc ddd dde ddg ddi ddk ddn ddr de- dec ded dee deg dei dek den der dgc dgd dge dgg dgi dgk dgn dgr di- dic did die dig dii dik din dir dkc dke dkg dki dkk dkr dnc dnd dne dng dni dnk dnn dnr drc drd dre drg dri drk drn drr ec- ecc ecd ece ecg eci eck ecn ecr ed- edc edd ede edg edi edk edn edr eec eed eee eeg eek een eer egc egd ege egg egi egn egr eic eid eie eig eii eik ein eir ekc ekd eke ekg eki ekr en- enc end ene eng eni enk enn enr erc erd ere erg eri erk ern err g-d gcc gcd gce gcg gci gck gcn gcr gdc gdd gde gdi gdk gdn gdr ge- gec ged gee geg gei gek gen ger ggc ggd ggg ggi ggn ggr gic gid gie gig gii gik gin gir gkd gkn gnc gnd gne gni gnn gnr grc grd gre grg gri grk grn grr i-d icc icd ice icg ici ick icn icr idc idd ide idg idi idk idn idr ie- iec ied iee ieg iei iek ien ier igc igd ige igg igi igk ign igr iic iid iie iii iin iir ikc ike iki ikk ikr in- inc ind ine ing ini ink inn inr ir- irc ird ire irg iri irk irn irr kcc kcd kce kcg kci kck kcn kcr kdc kde kdg kdk kdr ke- kec ked kee keg kei kek ken ker kgc kgd kgi kic kid kie kig kii kik kin kir kkc kke kki kkk kkn kkr kn- knc knd kne kng kni knk knn knr krc krd krg kri krk krn krr n-i ncc ncd nce ncg nci nck ncn ncr ndc ndd nde ndg ndi ndk ndn ndr ne- nec ned nee neg nei nek nen ner ngc ngd nge ngg ngi ngk ngn nic nid nie nig nii nik nin nir nkc nke nki nkk nkn nkr nnc nne nng nni nnk nnn nrc nrd nre nrg nri nrk nrn nrr rcc rcd rce rcg rci rcn rcr rdc rdd rde rdg rdi rdn rdr re- rec red ree reg rei rek ren rer rgc rgd rge rgg rgi rgk rgn rgr ric rid rie rig rii rik rin rir rkc rke rkg rkk rnc rnd rng rni rnn rnr rrc rrd rrg rri rrk rrn rrr