-er -up c-- ccc ccd cce ccp ccr ccs cct ccu cdc cdd cde cdp cdr cds cdt cdu ce- cec ced cee cep cer ces cet ceu cpc cpd cpe cpp cpr cps cpt cpu crc crd cre crp crr crs crt cru csc csd cse csp csr css cst csu ctc ctd cte ctp ctr cts ctt ctu cuc cud cue cup cur cus cut cuu dcc dcd dce dcp dcr dcs dct dcu ddc ddd dde ddp ddr dds ddt ddu de- dec ded dee dep der des det deu dpc dpd dpe dpp dpr dps dpt dpu drc drd dre drp drr drs drt dru dsc dsd dse dsp dsr dss dst dsu dtc dtd dte dtp dtr dts dtt dtu duc dud due dup dur dus dut ec- ecc ecd ece ecr ecs ect ecu ed- edc edd ede edp edr eds edt edu eec eed eee eep eer ees eet ep- epc epd epe epp epr eps ept epu erc erd ere erp err ers ert eru es- esc esd ese esp esr ess est esu etc etd ete etp etr ets ett etu eu- euc eud eue eup eur eus eut p-p pcc pcd pce pcp pcr pcs pct pcu pdc pdd pde pdp pdr pds pdt pdu pec ped pee pep per pes pet peu ppc ppd ppe ppp ppr pps ppt ppu prc prd pre prp prr prs prt pru ps- psc psd pse psp psr pss pst psu pt- ptc ptd pte ptp ptr pts ptt ptu puc pud pue pup pur pus put puu rcc rcd rce rcp rcr rcs rct rcu rdc rdd rde rdp rdr rds rdt rdu re- rec red ree rep rer res ret reu rpc rpd rpe rpp rpr rps rpt rpu rrc rrd rrp rrr rrs rrt rru rsc rsd rse rsp rsr rss rst rsu rtc rtd rte rtp rtr rts rtt rtu ruc rud rue rup rur rus rut ruu scc scd sce scp scr scs sct scu sdc sdd sde sdp sdr sds sdt sdu se- sec sed see sep ser ses set seu spc spd spe spp spr sps spt spu sr- src srd sre srp srr srs srt ss- ssc ssd sse ssp ssr sss sst ssu stc std ste stp str sts stt stu suc sud sue sup sur sus sut suu tcc tcd tce tcp tcr tcs tct tcu tdc tdd tde tdp tdr tds tdt tdu te- tec ted tee tep ter tes tet teu tpc tpd tpe tpp tpr tps tpt tpu trc trd tre trp trr trs trt tru tsc tsd tse tsp tsr tss tst tsu ttc ttd tte ttp ttr tts ttt ttu tuc tud tue tup tur tus tut tuu ucc ucd uce ucp ucr ucs uct ucu udc udd ude udp udr uds udt udu uec ued uee uep uer ues uet up- upc upd upe upp upr ups upt upu ur- urc urd ure urp urr urs urt uru usc usd use usp usr uss ust usu utc utd ute utp utr uts utt utu uuc uue uur uus uut uuu