-er c-- ccc cce cco ccr ccs ccu ce- cec cee ceo ceq cer ces ceu co- coc coe coo coq cor cos cou cqc cqo cqs crc cre cro crq crr crs cru csc cse cso csq csr css csu cuc cue cuo cuq cur cus cuu ec- ecc ece eco ecq ecr ecs ecu eec eee eeo eer ees eo- eoc eoe eoo eoq eor eos eou eqe eqq eqs equ erc ere ero erq err ers eru es- esc ese eso esq esr ess esu eu- euc eue eur eus oc- occ oco ocr ocs ocu oec oee oeo oer oes oo- ooc ooo oor oos oqo or- orc ore oro orr ors oru os- osc ose oso osq osr oss osu ou- ouc oue ouo our ous qcc qco qcs qec qee qeo qoo qor qos qqq qqu qrc qre qrs qru qsc qso qsr qu- que quo qur qus rcc rce rco rcr rcs rcu re- rec ree reo req rer res reu roc roe roo ror ros rou rqc rqs rrc rrq rrr rrs rru rsc rse rso rsq rsr rss rsu ruc rue ruo rur rus ruu scc sce sco scr scs scu se- sec see seo seq ser ses seu soc soe soo soq sor sos sou sqq sqr sqs sr- src sre sro srq srr srs ss- ssc sse sso ssq ssr sss ssu suc sue suo suq sur sus suu ucc uce uco ucr ucs ucu uec uee uer ues uoc uoe uoo uor uos ur- urc ure uro urr urs uru usc use uso usr uss usu uuc uue uur uus uuu