-er -up c-- ccc cce cck ccl ccp ccr ccu ce- cec cee cek cel cep cer ceu ckc cl- clc cle clk cll clp clr clu cpc cpe cpk cpl cpp cpr cpu crc cre crk crl crp crr cru cuc cue cuk cul cup cur cuu ec- ecc ece eck ecl ecr ecu eec eee eek eel eep eer ekc eke ekl ekp ekr eku elc ele elk ell elp elr elu ep- epc epe epl epp epr epu erc ere erk erl erp err eru eu- euc eue eul eup eur kcc kce kck kcl kcp kcr kcu ke- kec kee kek kel kep ker kkc kke kkk kkl kkp kkr kku kl- klc klr klu kpc kpe kpk kpl kpp kpr kpu krc krk krl krp krr kru kuc kue kuk kul kup kur kuu l-p lcc lce lck lcl lcp lcr lcu lec lee lek lel lep ler leu lkl lkp lkr llc lle llk lll llp llr llu lpc lpe lpk lpl lpp lpr lpu lrc lrk lrp lrr lru luc lue luk lul lup lur luu p-p pcc pce pck pcl pcp pcr pcu pec pee pek pel pep per peu pkc pke pkl pkp pkr pku plc ple plk pll plp plr plu ppc ppe ppk ppl ppp ppr ppu prc pre prk prl prp prr pru puc pue puk pul pup pur puu rcc rce rcl rcp rcr rcu re- rec ree rek rel rep rer reu rkc rke rkk rkp rku rlc rle rll rlp rlr rlu rpc rpe rpk rpl rpp rpr rpu rrc rrk rrl rrp rrr rru ruc rue ruk rup rur ruu ucc uce uck ucl ucp ucr ucu uec uee uel uep uer ukc uke ukk ukl ukp ukr uku ulc ule ulk ull ulp ulr ulu up- upc upe upk upp upr upu ur- urc ure urk url urp urr uru uuc uue uur uuu