-er -ic c-- ccc cce ccf cci ccr ccs ccu ccz ce- cec cee cef cei cer ces ceu cez cfc cfe cff cfi cfr cfs cfu cfz ci- cic cie cif cii cir cis ciu crc cre crf cri crr crs cru crz csc cse csf csi csr css csu csz cuc cue cuf cui cur cus cuu cuz cz- czc cze 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 erz es- esc ese esf esi esr ess esu eu- euc eue euf eui eur eus eze ezf ezr ezs ezz fcc fce fcf fci fcr fcs fcu fcz fec fee fef fei fer fes feu fez ffc ffe fff ffi ffr ffs ffu ffz fic fie fif fii fir fis fiu fiz 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 icz ie- iec iee ief iei ier ies ifc ife iff ifi ifr ifs ifu ifz 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 iuz ize izi izu izz rcc rce rcf rci rcr rcs rcu re- rec ree ref rei rer res reu rez rfc rfe rff rfi rfr rfs rfu rfz ric rie rif rii rir ris riz rrc rrf rri rrr rrs rru rsc rse rsf rsi rsr rss rsu ruc rue ruf rui rur rus ruu ruz rze scc sce scf sci scr scs scu se- sec see sef sei ser ses seu sez sfc sfe sff sfi sfr sfs sfu sfz sic sie sif sii sir sis siu sr- src sre srf sri srr srs ss- ssc sse ssf ssi ssr sss ssu ssz suc sue suf sui sur sus suu suz sze szi szr szu 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 urz usc use usf usi usr uss usu usz uuc uue uur uus uuu uzi uzu zce zcs zec zee zef zer zes zez zfc zfr zfs zie zif zir zis ziz zrs zse zsi zsu zsz zuc zui zur zus zuz zzr zzs zzz