-er c-- ccc ccd cce cck ccn ccr ccs cdc cdd cde cdk cdn cdr cds ce- cec ced cee cek cen cer ces ckc ckd cks cn- cnc cnd cne cnn cnr cns crc crd cre crk crn crr crs csc csd cse csk csn csr css dcc dcd dce dck dcn dcr dcs ddc ddd dde ddk ddn ddr dds de- dec ded dee dek den der des dkc dke dkk dkr dks dnc dnd dne dnk dnn dnr dns drc drd dre drk drn drr drs dsc dsd dse dsk dsn dsr dss ec- ecc ecd ece eck ecn ecr ecs ed- edc edd ede edk edn edr eds eec eed eee eek een eer ees ekc ekd eke ekr eks en- enc end ene enk enn enr ens erc erd ere erk ern err ers es- esc esd ese esk esn esr ess kcc kcd kce kck kcn kcr kcs kdc kde kdk kdr kds ke- kec ked kee kek ken ker kes kkc kke kkk kkn kkr kks kn- knc knd kne knk knn knr krc krd krk krn krr krs ksc ksd kse ksk ksn ksr kss ncc ncd nce nck ncn ncr ncs ndc ndd nde ndk ndn ndr nds ne- nec ned nee nek nen ner nes nkc nke nkk nkn nkr nks nnc nne nnk nnn nns nrc nrd nre nrk nrn nrr nrs nsc nsd nse nsk nsn nsr nss rcc rcd rce rcn rcr rcs rdc rdd rde rdn rdr rds re- rec red ree rek ren rer res rkc rke rkk rks rnc rnd rnn rnr rns rrc rrd rrk rrn rrr rrs rsc rsd rse rsk rsn rsr rss scc scd sce sck scn scr scs sdc sdd sde sdk sdn sdr sds se- sec sed see sek sen ser ses sk- skc skd ske skk skr sks snc snd sne snk snn snr sns sr- src srd sre srk srn srr srs ss- ssc ssd sse ssk ssn ssr sss