-er -up c-- ccc cce cck ccp ccr ccs ccu ce- cec cee cek cep cer ces ceu ckc cks cpc cpe cpk cpp cpr cps cpu crc cre crk crp crr crs cru csc cse csk csp csr css csu cuc cue cuk cup cur cus cuu ec- ecc ece eck ecr ecs ecu eec eee eek eep eer ees ekc eke ekp ekr eks eku ep- epc epe epp epr eps epu erc ere erk erp err ers eru es- esc ese esk esp esr ess esu eu- euc eue eup eur eus kcc kce kck kcp kcr kcs kcu ke- kec kee kek kep ker kes kkc kke kkk kkp kkr kks kku kpc kpe kpk kpp kpr kps kpu krc krk krp krr krs kru ksc kse ksk ksp ksr kss ksu kuc kue kuk kup kur kus kuu p-p pcc pce pck pcp pcr pcs pcu pec pee pek pep per pes peu pkc pke pkp pkr pks pku ppc ppe ppk ppp ppr pps ppu prc pre prk prp prr prs pru ps- psc pse psk psp psr pss psu puc pue puk pup pur pus puu rcc rce rcp rcr rcs rcu re- rec ree rek rep rer res reu rkc rke rkk rkp rks rku rpc rpe rpk rpp rpr rps rpu rrc rrk rrp rrr rrs rru rsc rse rsk rsp rsr rss rsu ruc rue ruk rup rur rus ruu scc sce sck scp scr scs scu se- sec see sek sep ser ses seu sk- skc ske skk skp skr sks sku spc spe spk spp spr sps spu sr- src sre srk srp srr srs ss- ssc sse ssk ssp ssr sss ssu suc sue suk sup sur sus suu ucc uce uck ucp ucr ucs ucu uec uee uep uer ues ukc uke ukk ukp ukr uku up- upc upe upk upp upr ups upu ur- urc ure urk urp urr urs uru usc use usk usp usr uss usu uuc uue uur uus uuu