-er -ic c-- ccc cce ccf cci cck ccr ccu ce- cec cee cef cei cek ceq cer ceu cfc cfe cff cfi cfk cfq cfr cfu ci- cic cie cif cii cik ciq cir ciu ckc cki cqc cqf cqi crc cre crf cri crk crq crr cru cuc cue cuf cui cuk cuq cur cuu ec- ecc ece ecf eci eck ecq ecr ecu eec eee eef eek eer ef- efc efe eff efi efr eic eie eif eii eik eir eiu ekc eke ekf eki ekr eku eqe eqf eqq equ erc ere erf eri erk erq err eru eu- euc eue euf eui eur fcc fce fcf fci fck fcr fcu fec fee fef fei fek fer feu ffc ffe fff ffi ffk ffr ffu fic fie fif fii fik fiq fir fiu fkc fkf fki fkk frc fre frf fri frk frq frr fru fue fuf fui fuk fur fuu i-f icc ice icf ici ick icq icr icu ie- iec iee ief iei iek ier ifc ife iff ifi ifr ifu iic iie iif iii iir iiu ikc ike ikf iki ikk ikr iku iqc iqe iqu ir- irc ire irf iri irk irq irr iru iu- iuc iue iui iur kcc kce kci kck kcr kcu ke- kec kee kef kei kek ker kfc kff kfi kfu kic kie kif kii kik kir kiu kkc kke kki kkk kkr kku krc krf kri krk krr kru kuc kue kui kuk kur kuu qcc qci qec qee qef qfc qfe qff qfi qic qie qik qir qiu qki qqk qqq qqu qrc qre qri qru qu- que qui qur rcc rce rcf rci rcr rcu re- rec ree ref rei rek req rer reu rfc rfe rff rfi rfk rfq rfr rfu ric rie rif rii rik riq rir rkc rke rkf rkk rku rqc rrc rrf rri rrk rrq rrr rru ruc rue ruf rui ruk rur ruu ucc uce ucf uci uck ucr ucu uec uee uef uei uer ufc ufe uff ufi ufr ufu uic uie uif uii uiq uir uiu ukc uke ukf uki ukk ukr uku ur- urc ure urf uri urk urr uru uuc uue uur uuu