-er -ic c-- ccc cce cci ccr ccs cct ccu ce- cec cee cei cer ces cet ceu ci- cic cie cii cir cis cit ciu crc cre cri crr crs crt cru csc cse csi csr css cst csu ctc cte cti ctr cts ctt ctu cuc cue cui cur cus cut cuu ec- ecc ece eci ecr ecs ect ecu eec eee eer ees eet eic eie eii eir eis eit eiu erc ere eri err ers ert eru es- esc ese esi esr ess est esu etc ete eti etr ets ett etu eu- euc eue eui eur eus eut icc ice ici icr ics ict icu ie- iec iee iei ier ies iet iic iie iii iir iis iit iiu ir- irc ire iri irr irs irt iru is- isc ise isi isr iss ist isu itc ite iti its itt itu iu- iuc iue iui iur ius iut rcc rce rci rcr rcs rct rcu re- rec ree rei rer res ret reu ric rie rii rir ris rit rrc rri rrr rrs rrt rru rsc rse rsi rsr rss rst rsu rtc rte rti rtr rts rtt rtu ruc rue rui rur rus rut ruu scc sce sci scr scs sct scu se- sec see sei ser ses set seu sic sie sii sir sis sit siu sr- src sre sri srr srs srt ss- ssc sse ssi ssr sss sst ssu stc ste sti str sts stt stu suc sue sui sur sus sut suu tcc tce tci tcr tcs tct tcu te- tec tee tei ter tes tet teu tic tie tii tir tis tit tiu trc tre tri trr trs trt tru tsc tse tsi tsr tss tst tsu ttc tte tti ttr tts ttt ttu tuc tue tui tur tus tut tuu ucc uce uci ucr ucs uct ucu uec uee uei uer ues uet uic uie uii uir uis uit uiu ur- urc ure uri urr urs urt uru usc use usi usr uss ust usu utc ute uti utr uts utt utu uuc uue uur uus uut uuu