-er -ic c-- ccc ccd cce ccf cci cco ccr ccs ccu cdc cdd cde cdf cdi cdo cdr cds cdu ce- cec ced cee cef cei ceo cer ces ceu cfc cfd cfe cff cfi cfo cfr cfs cfu ci- cic cid cie cif cii cio cir cis ciu co- coc cod coe cof coi coo cor cos cou crc crd cre crf cri cro crr crs cru csc csd cse csf csi cso csr css csu cuc cud cue cuf cui cuo cur cus cuu dcc dcd dce dcf dci dco dcr dcs dcu ddc ddd dde ddf ddi ddo ddr dds ddu de- dec ded dee def dei deo der des deu dfc dfd dfe dff dfi dfo dfr dfs dfu di- dic did die dif dii dio dir dis diu doc dod doe dof doi doo dor dos dou drc drd dre dri dro drr drs dru dsc dsd dse dsf dsi dso dsr dss dsu duc dud due duf dui duo dur dus ec- ecc ecd ece ecf eci eco ecr ecs ecu ed- edc edd ede edf edi edo edr eds edu eec eed eee eef eeo eer ees ef- efc efd efe eff efi efo efr efs eic eid eie eif eii eio eir eis eiu eo- eoc eod eoe eof eoi eoo eor eos eou erc erd ere erf eri ero err ers eru es- esc esd ese esf esi eso esr ess esu eu- euc eud eue euf eui eur eus fcc fcd fce fcf fci fco fcr fcs fcu fdc fdd fde fdf fdi fdo fdr fds fdu fec fed fee fef fei feo fer fes feu ffc ffd ffe fff ffi ffo ffr ffs ffu fic fid fie fif fii fir fis fiu foc foe fof foi foo for fos fou frc frd fre frf fri fro frr frs fru fsc fsd fse fsf fsi fso fsr fss fsu fud fue fuf fui fuo fur fus fuu i-d i-f icc icd ice icf ici ico icr ics icu idc idd ide idf idi ido idr ids idu ie- iec ied iee ief iei ier ies ifc ifd ife iff ifi ifo ifr ifs ifu iic iid iie iif iii iio iir iis iiu io- ioc iod ioe iof ioi ioo ior ios iou ir- irc ird ire irf iri iro irr irs iru is- isc isd ise isf isi iso isr iss isu iu- iuc iud iue iui iur ius o-i oc- occ ocd ocf oci oco ocr ocs ocu odc odd ode odf odi odo odr ods odu oec oed oee oef oei oeo oer oes of- ofc ofd ofe off ofi ofo ofr ofs ofu oic oid oie oif oii oio oir ois oiu oo- ooc ood oof ooi ooo oor oos or- orc ord ore orf ori oro orr ors oru os- osc osd ose osf osi oso osr oss osu ou- ouc oud oue ouf oui ouo our ous rcc rcd rce rcf rci rco rcr rcs rcu rdc rdd rde rdf rdi rdo rdr rds rdu re- rec red ree ref rei reo rer res reu rfc rfd rfe rff rfi rfo rfr rfs rfu ric rid rie rif rii rio rir ris roc rod roe rof roi roo ror ros rou rrc rrd rrf rri rrr rrs rru rsc rsd rse rsf rsi rso rsr rss rsu ruc rud rue ruf rui ruo rur rus ruu scc scd sce scf sci sco scr scs scu sdc sdd sde sdf sdi sdo sdr sds sdu se- sec sed see sef sei seo ser ses seu sfc sfd sfe sff sfi sfo sfr sfs sfu sic sid sie sif sii sio sir sis siu soc sod soe sof soi soo sor sos sou sr- src srd sre srf sri sro srr srs ss- ssc ssd sse ssf ssi sso ssr sss ssu suc sud sue suf sui suo sur sus suu ucc ucd uce ucf uci uco ucr ucs ucu udc udd ude udf udi udo udr uds udu uec ued uee uef uei uer ues ufc ufd ufe uff ufi ufo ufr ufs ufu uic uid uie uif uii uio uir uis uiu uoc uod uoe uoo uor uos ur- urc urd ure urf uri uro urr urs uru usc usd use usf usi uso usr uss usu uuc uue uur uus uuu