-er -ic c-- ccc cce ccf cci ccr ccs ccu ce- cec cee cef cei cer ces ceu cfc cfe cff cfi cfr cfs cfu ci- cic cie cif cii cir cis ciu crc cre crf cri crr crs cru csc cse csf csi csr css csu cuc cue cuf cui cur cus cuu ec- ecc ece ecf eci ecr ecs ecu eec eee eef eer ees ef- efc efe eff efi efr efs eic eie eif eii eir eis eiu erc ere erf eri err ers eru es- esc ese esf esi esr ess esu eu- euc eue euf eui eur eus fcc fce fcf fci fcr fcs fcu fec fee fef fei fer fes feu ffc ffe fff ffi ffr ffs ffu fic fie fif fii fir fis fiu frc fre frf fri frr frs fru fsc fse fsf fsi fsr fss fsu fue fuf fui fur fus fuu i-f icc ice icf ici icr ics icu ie- iec iee ief iei ier ies ifc ife iff ifi ifr ifs ifu iic iie iif iii iir iis iiu ir- irc ire irf iri irr irs iru is- isc ise isf isi isr iss isu iu- iuc iue iui iur ius rcc rce rcf rci rcr rcs rcu re- rec ree ref rei rer res reu rfc rfe rff rfi rfr rfs rfu ric rie rif rii rir ris rrc rrf rri rrr rrs rru rsc rse rsf rsi rsr rss rsu ruc rue ruf rui rur rus ruu scc sce scf sci scr scs scu se- sec see sef sei ser ses seu sfc sfe sff sfi sfr sfs sfu sic sie sif sii sir sis siu sr- src sre srf sri srr srs ss- ssc sse ssf ssi ssr sss ssu suc sue suf sui sur sus suu ucc uce ucf uci ucr ucs ucu uec uee uef uei uer ues ufc ufe uff ufi ufr ufs ufu uic uie uif uii uir uis uiu ur- urc ure urf uri urr urs uru usc use usf usi usr uss usu uuc uue uur uus uuu