-er -up c-- ccc cce cck ccp ccr ccs cct ccu ce- cec cee cek cep cer ces cet ceu ckc cks ckt cpc cpe cpk cpp cpr cps cpt cpu crc cre crk crp crr crs crt cru csc cse csk csp csr css cst csu ctc cte ctk ctp ctr cts ctt ctu cuc cue cuk cup cur cus cut cuu ec- ecc ece eck ecr ecs ect ecu eec eee eek eep eer ees eet ekc eke ekp ekr eks ekt eku ep- epc epe epp epr eps ept epu erc ere erk erp err ers ert eru es- esc ese esk esp esr ess est esu etc ete etk etp etr ets ett etu eu- euc eue eup eur eus eut k-t kcc kce kck kcp kcr kcs kct kcu ke- kec kee kek kep ker kes ket kkc kke kkk kkp kkr kks kkt kku kpc kpe kpk kpp kpr kps kpt kpu krc krk krp krr krs krt kru ksc kse ksk ksp ksr kss kst ksu ktc kte ktk ktp ktr kts ktt ktu kuc kue kuk kup kur kus kut kuu p-p pcc pce pck pcp pcr pcs pct pcu pec pee pek pep per pes pet peu pkc pke pkp pkr pks pkt pku ppc ppe ppk ppp ppr pps ppt ppu prc pre prk prp prr prs prt pru ps- psc pse psk psp psr pss pst psu pt- ptc pte ptk ptp ptr pts ptt ptu puc pue puk pup pur pus put puu rcc rce rcp rcr rcs rct rcu re- rec ree rek rep rer res ret reu rkc rke rkk rkp rks rkt rku rpc rpe rpk rpp rpr rps rpt rpu rrc rrk rrp rrr rrs rrt rru rsc rse rsk rsp rsr rss rst rsu rtc rte rtk rtp rtr rts rtt rtu ruc rue ruk rup rur rus rut ruu scc sce sck scp scr scs sct scu se- sec see sek sep ser ses set seu sk- skc ske skk skp skr sks skt sku spc spe spk spp spr sps spt spu sr- src sre srk srp srr srs srt ss- ssc sse ssk ssp ssr sss sst ssu stc ste stk stp str sts stt stu suc sue suk sup sur sus sut suu tcc tce tck tcp tcr tcs tct tcu te- tec tee tek tep ter tes tet teu tkc tke tkk tkp tkr tks tkt tpc tpe tpk tpp tpr tps tpt tpu trc tre trk trp trr trs trt tru tsc tse tsk tsp tsr tss tst tsu ttc tte ttk ttp ttr tts ttt ttu tuc tue tuk tup tur tus tut tuu ucc uce uck ucp ucr ucs uct ucu uec uee uep uer ues uet ukc uke ukk ukp ukr uku up- upc upe upk upp upr ups upt upu ur- urc ure urk urp urr urs urt uru usc use usk usp usr uss ust usu utc ute utk utp utr uts utt utu uuc uue uur uus uut uuu