-er -up c-- ccc cce ccp ccr ccs cct ccu ce- cec cee cep cer ces cet ceu cpc cpe cpp cpr cps cpt cpu crc cre crp crr crs crt cru csc cse csp csr css cst csu ctc cte ctp ctr cts ctt ctu cuc cue cup cur cus cut cuu ec- ecc ece ecr ecs ect ecu eec eee eep eer ees eet ep- epc epe epp epr eps ept epu erc ere erp err ers ert eru es- esc ese esp esr ess est esu etc ete etp etr ets ett etu eu- euc eue eup eur eus eut p-p pcc pce pcp pcr pcs pct pcu pec pee pep per pes pet peu ppc ppe ppp ppr pps ppt ppu prc pre prp prr prs prt pru ps- psc pse psp psr pss pst psu pt- ptc pte ptp ptr pts ptt ptu puc pue pup pur pus put puu rcc rce rcp rcr rcs rct rcu re- rec ree rep rer res ret reu rpc rpe rpp rpr rps rpt rpu rrc rrp rrr rrs rrt rru rsc rse rsp rsr rss rst rsu rtc rte rtp rtr rts rtt rtu ruc rue rup rur rus rut ruu scc sce scp scr scs sct scu se- sec see sep ser ses set seu spc spe spp spr sps spt spu sr- src sre srp srr srs srt ss- ssc sse ssp ssr sss sst ssu stc ste stp str sts stt stu suc sue sup sur sus sut suu tcc tce tcp tcr tcs tct tcu te- tec tee tep ter tes tet teu tpc tpe tpp tpr tps tpt tpu trc tre trp trr trs trt tru tsc tse tsp tsr tss tst tsu ttc tte ttp ttr tts ttt ttu tuc tue tup tur tus tut tuu ucc uce ucp ucr ucs uct ucu uec uee uep uer ues uet up- upc upe upp upr ups upt upu ur- urc ure urp urr urs urt uru usc use usp usr uss ust usu utc ute utp utr uts utt utu uuc uue uur uus uut uuu