-er -ic c-- ccc ccd cce cci ccr ccs cct ccu cdc cdd cde cdi cdr cds cdt cdu ce- cec ced cee cei cer ces cet ceu ci- cic cid cie cii cir cis cit ciu crc crd cre cri crr crs crt cru csc csd cse csi csr css cst csu ctc ctd cte cti ctr cts ctt ctu cuc cud cue cui cur cus cut cuu dcc dcd dce dci dcr dcs dct dcu ddc ddd dde ddi ddr dds ddt ddu de- dec ded dee dei der des det deu di- dic did die dii dir dis dit diu drc drd dre dri drr drs drt dru dsc dsd dse dsi dsr dss dst dsu dtc dtd dte dti dtr dts dtt dtu duc dud due dui dur dus dut ec- ecc ecd ece eci ecr ecs ect ecu ed- edc edd ede edi edr eds edt edu eec eed eee eer ees eet eic eid eie eii eir eis eit eiu erc erd ere eri err ers ert eru es- esc esd ese esi esr ess est esu etc etd ete eti etr ets ett etu eu- euc eud eue eui eur eus eut i-d icc icd ice ici icr ics ict icu idc idd ide idi idr ids idt idu ie- iec ied iee iei ier ies iet iic iid iie iii iir iis iit iiu ir- irc ird ire iri irr irs irt iru is- isc isd ise isi isr iss ist isu itc itd ite iti its itt itu iu- iuc iud iue iui iur ius iut rcc rcd rce rci rcr rcs rct rcu rdc rdd rde rdi rdr rds rdt rdu re- rec red ree rei rer res ret reu ric rid rie rii rir ris rit rrc rrd rri rrr rrs rrt rru rsc rsd rse rsi rsr rss rst rsu rtc rtd rte rti rtr rts rtt rtu ruc rud rue rui rur rus rut ruu scc scd sce sci scr scs sct scu sdc sdd sde sdi sdr sds sdt sdu se- sec sed see sei ser ses set seu sic sid sie sii sir sis sit siu sr- src srd sre sri srr srs srt ss- ssc ssd sse ssi ssr sss sst ssu stc std ste sti str sts stt stu suc sud sue sui sur sus sut suu tcc tcd tce tci tcr tcs tct tcu tdc tdd tde tdi tdr tds tdt tdu te- tec ted tee tei ter tes tet teu tic tid tie tii tir tis tit tiu trc trd tre tri trr trs trt tru tsc tsd tse tsi tsr tss tst tsu ttc ttd tte tti ttr tts ttt ttu tuc tud tue tui tur tus tut tuu ucc ucd uce uci ucr ucs uct ucu udc udd ude udi udr uds udt udu uec ued uee uei uer ues uet uic uid uie uii uir uis uit uiu ur- urc urd ure uri urr urs urt uru usc usd use usi usr uss ust usu utc utd ute uti utr uts utt utu uuc uue uur uus uut uuu