-er c-- ccc cce ccr ccs cct ccu ce- cec cee ceq cer ces cet ceu cqc cqs cqt crc cre crq crr crs crt cru csc cse csq csr css cst csu ctc cte ctq ctr cts ctt ctu cuc cue cuq cur cus cut cuu ec- ecc ece ecq ecr ecs ect ecu eec eee eer ees eet eqe eqq eqs eqt equ erc ere erq err ers ert eru es- esc ese esq esr ess est esu etc ete etr ets ett etu eu- euc eue eur eus eut qcc qcs qct qec qee qet qqq qqu qrc qre qrs qrt qru qsc qsr qst qtc qtq qtr qts qu- que qur qus qut rcc rce rcr rcs rct rcu re- rec ree req rer res ret reu rqc rqs rrc rrq rrr rrs rrt rru rsc rse rsq rsr rss rst rsu rtc rte rtq rtr rts rtt rtu ruc rue rur rus rut ruu scc sce scr scs sct scu se- sec see seq ser ses set seu sqq sqr sqs sr- src sre srq srr srs srt ss- ssc sse ssq ssr sss sst ssu stc ste stq str sts stt stu suc sue suq sur sus sut suu tcc tce tcr tcs tct tcu te- tec tee teq ter tes tet teu trc tre trq trr trs trt tru tsc tse tsq tsr tss tst tsu ttc tte ttr tts ttt ttu tuc tue tur tus tut tuu ucc uce ucr ucs uct ucu uec uee uer ues uet ur- urc ure urr urs urt uru usc use usr uss ust usu utc ute utr uts utt utu uuc uue uur uus uut uuu