-er -ic c-- ccc ccd cce ccf cci ccn cco ccr ccs cdc cdd cde cdf cdi cdn cdo cdr cds ce- cec ced cee cef cei cen ceo cer ces cfc cfd cfe cff cfi cfn cfo cfr cfs ci- cic cid cie cif cii cin cio cir cis cn- cnc cnd cne cnf cni cnn cno cnr cns co- coc cod coe cof coi con coo cor cos crc crd cre crf cri crn cro crr crs csc csd cse csf csi csn cso csr css dcc dcd dce dcf dci dcn dco dcr dcs ddc ddd dde ddf ddi ddn ddo ddr dds de- dec ded dee def dei den deo der des dfc dfd dfe dff dfi dfn dfo dfr dfs di- dic did die dif dii din dio dir dis dnc dnd dne dnf dni dnn dno dnr dns doc dod doe dof doi don doo dor dos drc drd dre dri drn dro drr drs dsc dsd dse dsf dsi dsn dso dsr dss ec- ecc ecd ece ecf eci ecn eco ecr ecs ed- edc edd ede edf edi edn edo edr eds eec eed eee eef een eeo eer ees ef- efc efd efe eff efi efo efr efs eic eid eie eif eii ein eio eir eis en- enc end ene enf eni enn eno enr ens eo- eoc eod eoe eof eoi eon eoo eor eos erc erd ere erf eri ern ero err ers es- esc esd ese esf esi esn eso esr ess fcc fcd fce fcf fci fcn fco fcr fcs fdc fdd fde fdf fdi fdn fdo fdr fds fec fed fee fef fei fen feo fer fes ffc ffd ffe fff ffi ffn ffo ffr ffs fic fid fie fif fii fin fir fis fnc fnd fne fnf fni fnn fnr fns foc foe fof foi fon foo for fos frc frd fre frf fri frn fro frr frs fsc fsd fse fsf fsi fsn fso fsr fss i-d i-f icc icd ice icf ici icn ico icr ics idc idd ide idf idi idn ido idr ids ie- iec ied iee ief iei ien ier ies ifc ifd ife iff ifi ifn ifo ifr ifs iic iid iie iif iii iin iio iir iis in- inc ind ine inf ini inn ino inr ins io- ioc iod ioe iof ioi ion ioo ior ios ir- irc ird ire irf iri irn iro irr irs is- isc isd ise isf isi isn iso isr iss n-i ncc ncd nce ncf nci ncn nco ncr ncs ndc ndd nde ndf ndi ndn ndo ndr nds ne- nec ned nee nef nei nen neo ner nes nfc nfd nfe nff nfi nfn nfo nfr nfs nic nid nie nif nii nin nio nir nis nnc nne nnf nni nnn nno nns no- noc nod noe nof noi non noo nor nos nrc nrd nre nrf nri nrn nro nrr nrs nsc nsd nse nsf nsi nsn nso nsr nss o-i oc- occ ocd ocf oci ocn oco ocr ocs odc odd ode odf odi odn odo odr ods oec oed oee oef oei oen oeo oer oes of- ofc ofd ofe off ofi ofn ofo ofr ofs oic oid oie oif oii oin oio oir ois on- onc ond one onf oni onn ono onr ons oo- ooc ood oof ooi oon ooo oor oos or- orc ord ore orf ori orn oro orr ors os- osc osd ose osf osi osn oso osr oss rcc rcd rce rcf rci rcn rco rcr rcs rdc rdd rde rdf rdi rdn rdo rdr rds re- rec red ree ref rei ren reo rer res rfc rfd rfe rff rfi rfn rfo rfr rfs ric rid rie rif rii rin rio rir ris rnc rnd rni rnn rno rnr rns roc rod roe rof roi ron roo ror ros rrc rrd rrf rri rrn rrr rrs rsc rsd rse rsf rsi rsn rso rsr rss scc scd sce scf sci scn sco scr scs sdc sdd sde sdf sdi sdn sdo sdr sds se- sec sed see sef sei sen seo ser ses sfc sfd sfe sff sfi sfn sfo sfr sfs sic sid sie sif sii sin sio sir sis snc snd sne snf sni snn sno snr sns soc sod soe sof soi son soo sor sos sr- src srd sre srf sri srn sro srr srs ss- ssc ssd sse ssf ssi ssn sso ssr sss