-er -ic c-- ccc ccd cce cci cck ccn ccr ccs cdc cdd cde cdi cdk cdn cdr cds ce- cec ced cee cei cek cen cer ces ci- cic cid cie cii cik cin cir cis ckc ckd cki cks cn- cnc cnd cne cni cnn cnr cns crc crd cre cri crk crn crr crs csc csd cse csi csk csn csr css dcc dcd dce dci dck dcn dcr dcs ddc ddd dde ddi ddk ddn ddr dds de- dec ded dee dei dek den der des di- dic did die dii dik din dir dis dkc dke dki dkk dkr dks dnc dnd dne dni dnk dnn dnr dns drc drd dre dri drk drn drr drs dsc dsd dse dsi dsk dsn dsr dss ec- ecc ecd ece eci eck ecn ecr ecs ed- edc edd ede edi edk edn edr eds eec eed eee eek een eer ees eic eid eie eii eik ein eir eis ekc ekd eke eki ekr eks en- enc end ene eni enk enn enr ens erc erd ere eri erk ern err ers es- esc esd ese esi esk esn esr ess i-d icc icd ice ici ick icn icr ics idc idd ide idi idk idn idr ids ie- iec ied iee iei iek ien ier ies iic iid iie iii iin iir iis ikc ike iki ikk ikr iks in- inc ind ine ini ink inn inr ins ir- irc ird ire iri irk irn irr irs is- isc isd ise isi isk isn isr iss kcc kcd kce kci kck kcn kcr kcs kdc kde kdk kdr kds ke- kec ked kee kei kek ken ker kes kic kid kie kii kik kin kir kis kkc kke kki kkk kkn kkr kks kn- knc knd kne kni knk knn knr krc krd kri krk krn krr krs ksc ksd kse ksi ksk ksn ksr kss n-i ncc ncd nce nci nck ncn ncr ncs ndc ndd nde ndi ndk ndn ndr nds ne- nec ned nee nei nek nen ner nes nic nid nie nii nik nin nir nis nkc nke nki nkk nkn nkr nks nnc nne nni nnk nnn nns nrc nrd nre nri nrk nrn nrr nrs nsc nsd nse nsi nsk nsn nsr nss rcc rcd rce rci rcn rcr rcs rdc rdd rde rdi rdn rdr rds re- rec red ree rei rek ren rer res ric rid rie rii rik rin rir ris rkc rke rkk rks rnc rnd rni rnn rnr rns rrc rrd rri rrk rrn rrr rrs rsc rsd rse rsi rsk rsn rsr rss scc scd sce sci sck scn scr scs sdc sdd sde sdi sdk sdn sdr sds se- sec sed see sei sek sen ser ses sic sid sie sii sik sin sir sis sk- skc skd ske ski skk skr sks snc snd sne sni snk snn snr sns sr- src srd sre sri srk srn srr srs ss- ssc ssd sse ssi ssk ssn ssr sss