-er -ic c-- ccc cce ccf cci cck ccr ccs ccu ce- cec cee cef cei cek cer ces ceu cfc cfe cff cfi cfk cfr cfs cfu ci- cic cie cif cii cik cir cis ciu ckc cki cks crc cre crf cri crk crr crs cru csc cse csf csi csk csr css csu cuc cue cuf cui cuk cur cus cuu ec- ecc ece ecf eci eck ecr ecs ecu eec eee eef eek eer ees ef- efc efe eff efi efr efs eic eie eif eii eik eir eis eiu ekc eke ekf eki ekr eks eku erc ere erf eri erk err ers eru es- esc ese esf esi esk esr ess esu eu- euc eue euf eui eur eus fcc fce fcf fci fck fcr fcs fcu fec fee fef fei fek fer fes feu ffc ffe fff ffi ffk ffr ffs ffu fic fie fif fii fik fir fis fiu fkc fkf fki fkk frc fre frf fri frk frr frs fru fsc fse fsf fsi fsk fsr fss fsu fue fuf fui fuk fur fus fuu i-f icc ice icf ici ick icr ics icu ie- iec iee ief iei iek ier ies ifc ife iff ifi ifr ifs ifu iic iie iif iii iir iis iiu ikc ike ikf iki ikk ikr iks iku ir- irc ire irf iri irk irr irs iru is- isc ise isf isi isk isr iss isu iu- iuc iue iui iur ius kcc kce kci kck kcr kcs kcu ke- kec kee kef kei kek ker kes kfc kff kfi kfs kfu kic kie kif kii kik kir kis kiu kkc kke kki kkk kkr kks kku krc krf kri krk krr krs kru ksc kse ksf ksi ksk ksr kss ksu kuc kue kui kuk kur kus kuu rcc rce rcf rci rcr rcs rcu re- rec ree ref rei rek rer res reu rfc rfe rff rfi rfk rfr rfs rfu ric rie rif rii rik rir ris rkc rke rkf rkk rks rku rrc rrf rri rrk rrr rrs rru rsc rse rsf rsi rsk rsr rss rsu ruc rue ruf rui ruk rur rus ruu scc sce scf sci sck scr scs scu se- sec see sef sei sek ser ses seu sfc sfe sff sfi sfk sfr sfs sfu sic sie sif sii sik sir sis siu sk- skc ske skf ski skk skr sks sku sr- src sre srf sri srk srr srs ss- ssc sse ssf ssi ssk ssr sss ssu suc sue suf sui suk sur sus suu ucc uce ucf uci uck ucr ucs ucu uec uee uef uei uer ues ufc ufe uff ufi ufr ufs ufu uic uie uif uii uir uis uiu ukc uke ukf uki ukk ukr uku ur- urc ure urf uri urk urr urs uru usc use usf usi usk usr uss usu uuc uue uur uus uuu