-er -ic c-- ccc cce ccf cci ccr ccu ce- cec cee cef cei cer ceu cfc cfe cff cfi cfr cfu ci- cic cie cif cii cir ciu crc cre crf cri crr cru cuc cue cuf cui cur cuu ec- ecc ece ecf eci ecr ecu eec eee eef eer ef- efc efe eff efi efr eic eie eif eii eir eiu erc ere erf eri err eru eu- euc eue euf eui eur fcc fce fcf fci fcr fcu fec fee fef fei fer feu ffc ffe fff ffi ffr ffu fic fie fif fii fir fiu frc fre frf fri frr fru fue fuf fui fur fuu i-f icc ice icf ici icr icu ie- iec iee ief iei ier ifc ife iff ifi ifr ifu iic iie iif iii iir iiu ir- irc ire irf iri irr iru iu- iuc iue iui iur rcc rce rcf rci rcr rcu re- rec ree ref rei rer reu rfc rfe rff rfi rfr rfu ric rie rif rii rir rrc rrf rri rrr rru ruc rue ruf rui rur ruu ucc uce ucf uci ucr ucu uec uee uef uei uer ufc ufe uff ufi ufr ufu uic uie uif uii uir uiu ur- urc ure urf uri urr uru uuc uue uur uuu