-er -ic c-- ccc ccd cce ccf cci ccr ccs ccu cdc cdd cde cdf cdi cdr cds cdu ce- cec ced cee cef cei cer ces ceu cfc cfd cfe cff cfi cfr cfs cfu ci- cic cid cie cif cii cir cis ciu crc crd cre crf cri crr crs cru csc csd cse csf csi csr css csu cuc cud cue cuf cui cur cus cuu dcc dcd dce dcf dci dcr dcs dcu ddc ddd dde ddf ddi ddr dds ddu de- dec ded dee def dei der des deu dfc dfd dfe dff dfi dfr dfs dfu di- dic did die dif dii dir dis diu drc drd dre dri drr drs dru dsc dsd dse dsf dsi dsr dss dsu duc dud due duf dui dur dus ec- ecc ecd ece ecf eci ecr ecs ecu ed- edc edd ede edf edi edr eds edu eec eed eee eef eer ees ef- efc efd efe eff efi efr efs eic eid eie eif eii eir eis eiu erc erd ere erf eri err ers eru es- esc esd ese esf esi esr ess esu eu- euc eud eue euf eui eur eus fcc fcd fce fcf fci fcr fcs fcu fdc fdd fde fdf fdi fdr fds fdu fec fed fee fef fei fer fes feu ffc ffd ffe fff ffi ffr ffs ffu fic fid fie fif fii fir fis fiu frc frd fre frf fri frr frs fru fsc fsd fse fsf fsi fsr fss fsu fud fue fuf fui fur fus fuu i-d i-f icc icd ice icf ici icr ics icu idc idd ide idf idi idr ids idu ie- iec ied iee ief iei ier ies ifc ifd ife iff ifi ifr ifs ifu iic iid iie iif iii iir iis iiu ir- irc ird ire irf iri irr irs iru is- isc isd ise isf isi isr iss isu iu- iuc iud iue iui iur ius rcc rcd rce rcf rci rcr rcs rcu rdc rdd rde rdf rdi rdr rds rdu re- rec red ree ref rei rer res reu rfc rfd rfe rff rfi rfr rfs rfu ric rid rie rif rii rir ris rrc rrd rrf rri rrr rrs rru rsc rsd rse rsf rsi rsr rss rsu ruc rud rue ruf rui rur rus ruu scc scd sce scf sci scr scs scu sdc sdd sde sdf sdi sdr sds sdu se- sec sed see sef sei ser ses seu sfc sfd sfe sff sfi sfr sfs sfu sic sid sie sif sii sir sis siu sr- src srd sre srf sri srr srs ss- ssc ssd sse ssf ssi ssr sss ssu suc sud sue suf sui sur sus suu ucc ucd uce ucf uci ucr ucs ucu udc udd ude udf udi udr uds udu uec ued uee uef uei uer ues ufc ufd ufe uff ufi ufr ufs ufu uic uid uie uif uii uir uis uiu ur- urc urd ure urf uri urr urs uru usc usd use usf usi usr uss usu uuc uue uur uus uuu