-er -up c-- ccc cce ccf cck ccp ccr ccs ccu ce- cec cee cef cek cep cer ces ceu cfc cfe cff cfk cfp cfr cfs cfu ckc cks cpc cpe cpf cpk cpp cpr cps cpu crc cre crf crk crp crr crs cru csc cse csf csk csp csr css csu cuc cue cuf cuk cup cur cus cuu ec- ecc ece ecf eck ecr ecs ecu eec eee eef eek eep eer ees ef- efc efe eff efp efr efs ekc eke ekf ekp ekr eks eku ep- epc epe epf epp epr eps epu erc ere erf erk erp err ers eru es- esc ese esf esk esp esr ess esu eu- euc eue euf eup eur eus fcc fce fcf fck fcp fcr fcs fcu fec fee fef fek fep fer fes feu ffc ffe fff ffk ffp ffr ffs ffu fkc fkf fkk fkp fpc fpe fpk fpp fpr fps fpu frc fre frf frk frp frr frs fru fsc fse fsf fsk fsp fsr fss fsu fue fuf fuk fup fur fus fuu kcc kce kck kcp kcr kcs kcu ke- kec kee kef kek kep ker kes kfc kff kfs kfu kkc kke kkk kkp kkr kks kku kpc kpe kpf kpk kpp kpr kps kpu krc krf krk krp krr krs kru ksc kse ksf ksk ksp ksr kss ksu kuc kue kuk kup kur kus kuu p-p pcc pce pcf pck pcp pcr pcs pcu pec pee pef pek pep per pes peu pfc pfe pff pfk pfp pfr pfs pfu pkc pke pkf pkp pkr pks pku ppc ppe ppf ppk ppp ppr pps ppu prc pre prf prk prp prr prs pru ps- psc pse psf psk psp psr pss psu puc pue puf puk pup pur pus puu rcc rce rcf rcp rcr rcs rcu re- rec ree ref rek rep rer res reu rfc rfe rff rfk rfp rfr rfs rfu rkc rke rkf rkk rkp rks rku rpc rpe rpf rpk rpp rpr rps rpu rrc rrf rrk rrp rrr rrs rru rsc rse rsf rsk rsp rsr rss rsu ruc rue ruf ruk rup rur rus ruu scc sce scf sck scp scr scs scu se- sec see sef sek sep ser ses seu sfc sfe sff sfk sfp sfr sfs sfu sk- skc ske skf skk skp skr sks sku spc spe spf spk spp spr sps spu sr- src sre srf srk srp srr srs ss- ssc sse ssf ssk ssp ssr sss ssu suc sue suf suk sup sur sus suu ucc uce ucf uck ucp ucr ucs ucu uec uee uef uep uer ues ufc ufe uff ufp ufr ufs ufu ukc uke ukf ukk ukp ukr uku up- upc upe upf upk upp upr ups upu ur- urc ure urf urk urp urr urs uru usc use usf usk usp usr uss usu uuc uue uur uus uuu