-er -up c-- ccc cce cck ccl ccp ccr ccs ccu ce- cec cee cek cel cep cer ces ceu ckc cks cl- clc cle clk cll clp clr cls clu cpc cpe cpk cpl cpp cpr cps cpu crc cre crk crl crp crr crs cru csc cse csk csl csp csr css csu cuc cue cuk cul cup cur cus cuu ec- ecc ece eck ecl ecr ecs ecu eec eee eek eel eep eer ees ekc eke ekl ekp ekr eks eku elc ele elk ell elp elr els elu ep- epc epe epl epp epr eps epu erc ere erk erl erp err ers eru es- esc ese esk esl esp esr ess esu eu- euc eue eul eup eur eus kcc kce kck kcl kcp kcr kcs kcu ke- kec kee kek kel kep ker kes kkc kke kkk kkl kkp kkr kks kku kl- klc klr kls klu kpc kpe kpk kpl kpp kpr kps kpu krc krk krl krp krr krs kru ksc kse ksk ksl ksp ksr kss ksu kuc kue kuk kul kup kur kus kuu l-p lcc lce lck lcl lcp lcr lcs lcu lec lee lek lel lep ler les leu lkl lkp lkr lks llc lle llk lll llp llr lls llu lpc lpe lpk lpl lpp lpr lps lpu lrc lrk lrp lrr lrs lru lsc lse lsk lsl lsp lsr lss lsu luc lue luk lul lup lur lus luu p-p pcc pce pck pcl pcp pcr pcs pcu pec pee pek pel pep per pes peu pkc pke pkl pkp pkr pks pku plc ple plk pll plp plr pls plu ppc ppe ppk ppl ppp ppr pps ppu prc pre prk prl prp prr prs pru ps- psc pse psk psl psp psr pss psu puc pue puk pul pup pur pus puu rcc rce rcl rcp rcr rcs rcu re- rec ree rek rel rep rer res reu rkc rke rkk rkp rks rku rlc rle rll rlp rlr rls rlu rpc rpe rpk rpl rpp rpr rps rpu rrc rrk rrl rrp rrr rrs rru rsc rse rsk rsl rsp rsr rss rsu ruc rue ruk rup rur rus ruu scc sce sck scl scp scr scs scu se- sec see sek sel sep ser ses seu sk- skc ske skk skl skp skr sks sku slc sle slk sll slp slr sls slu spc spe spk spl spp spr sps spu sr- src sre srk srl srp srr srs ss- ssc sse ssk ssl ssp ssr sss ssu suc sue suk sul sup sur sus suu ucc uce uck ucl ucp ucr ucs ucu uec uee uel uep uer ues ukc uke ukk ukl ukp ukr uku ulc ule ulk ull ulp ulr uls ulu up- upc upe upk upp upr ups upu ur- urc ure urk url urp urr urs uru usc use usk usl usp usr uss usu uuc uue uur uus uuu