-er c-- ccc ccd cce ccn cco ccr ccs ccu cdc cdd cde cdn cdo cdr cds cdu ce- cec ced cee cen ceo cer ces ceu cn- cnc cnd cne cnn cno cnr cns cnu co- coc cod coe con coo cor cos cou crc crd cre crn cro crr crs cru csc csd cse csn cso csr css csu cuc cud cue cun cuo cur cus cuu dcc dcd dce dcn dco dcr dcs dcu ddc ddd dde ddn ddo ddr dds ddu de- dec ded dee den deo der des deu dnc dnd dne dnn dno dnr dns doc dod doe don doo dor dos dou drc drd dre drn dro drr drs dru dsc dsd dse dsn dso dsr dss dsu duc dud due dun duo dur dus ec- ecc ecd ece ecn eco ecr ecs ecu ed- edc edd ede edn edo edr eds edu eec eed eee een eeo eer ees en- enc end ene enn eno enr ens enu eo- eoc eod eoe eon eoo eor eos eou erc erd ere ern ero err ers eru es- esc esd ese esn eso esr ess esu eu- euc eud eue eun eur eus ncc ncd nce ncn nco ncr ncs ncu ndc ndd nde ndn ndo ndr nds ndu ne- nec ned nee nen neo ner nes neu nnc nne nnn nno nns nnu no- noc nod noe non noo nor nos nou nrc nrd nre nrn nro nrr nrs nru nsc nsd nse nsn nso nsr nss nsu nuc nud nue nun nuo nur nus nuu oc- occ ocd ocn oco ocr ocs ocu odc odd ode odn odo odr ods odu oec oed oee oen oeo oer oes on- onc ond one onn ono onr ons onu oo- ooc ood oon ooo oor oos or- orc ord ore orn oro orr ors oru os- osc osd ose osn oso osr oss osu ou- ouc oud oue oun ouo our ous rcc rcd rce rcn rco rcr rcs rcu rdc rdd rde rdn rdo rdr rds rdu re- rec red ree ren reo rer res reu rnc rnd rnn rno rnr rns rnu roc rod roe ron roo ror ros rou rrc rrd rrn rrr rrs rru rsc rsd rse rsn rso rsr rss rsu ruc rud rue run ruo rur rus ruu scc scd sce scn sco scr scs scu sdc sdd sde sdn sdo sdr sds sdu se- sec sed see sen seo ser ses seu snc snd sne snn sno snr sns snu soc sod soe son soo sor sos sou sr- src srd sre srn sro srr srs ss- ssc ssd sse ssn sso ssr sss ssu suc sud sue sun suo sur sus suu ucc ucd uce ucn uco ucr ucs ucu udc udd ude udn udo udr uds udu uec ued uee uen uer ues un- unc und une unn uno unr uns unu uoc uod uoe uon uoo uor uos ur- urc urd ure urn uro urr urs uru usc usd use usn uso usr uss usu uuc uue uun uur uus uuu