-er c-- ccc cce ccn cco ccr ccs ccu ce- cec cee cen ceo cer ces ceu cn- cnc cne cnn cno cnr cns cnu co- coc coe con coo cor cos cou crc cre crn cro crr crs cru csc cse csn cso csr css csu cuc cue cun cuo cur cus cuu ec- ecc ece ecn eco ecr ecs ecu eec eee een eeo eer ees en- enc ene enn eno enr ens enu eo- eoc eoe eon eoo eor eos eou erc ere ern ero err ers eru es- esc ese esn eso esr ess esu eu- euc eue eun eur eus ncc nce ncn nco ncr ncs ncu ne- nec nee nen neo ner nes neu nnc nne nnn nno nns nnu no- noc noe non noo nor nos nou nrc nre nrn nro nrr nrs nru nsc nse nsn nso nsr nss nsu nuc nue nun nuo nur nus nuu oc- occ ocn oco ocr ocs ocu oec oee oen oeo oer oes on- onc one onn ono onr ons onu oo- ooc oon ooo oor oos or- orc ore orn oro orr ors oru os- osc ose osn oso osr oss osu ou- ouc oue oun ouo our ous rcc rce rcn rco rcr rcs rcu re- rec ree ren reo rer res reu rnc rnn rno rnr rns rnu roc roe ron roo ror ros rou rrc rrn rrr rrs rru rsc rse rsn rso rsr rss rsu ruc rue run ruo rur rus ruu scc sce scn sco scr scs scu se- sec see sen seo ser ses seu snc sne snn sno snr sns snu soc soe son soo sor sos sou sr- src sre srn sro srr srs ss- ssc sse ssn sso ssr sss ssu suc sue sun suo sur sus suu ucc uce ucn uco ucr ucs ucu uec uee uen uer ues un- unc une unn uno unr uns unu uoc uoe uon uoo uor uos ur- urc ure urn uro urr urs uru usc use usn uso usr uss usu uuc uue uun uur uus uuu