-er -ic c-- ccc cce ccf ccg cci ccm cco ccr ccs ce- cec cee cef ceg cei cem ceo cer ces cfc cfe cff cfg cfi cfm cfo cfr cfs cgc cge cgg cgi cgm cgo cgr cgs ci- cic cie cif cig cii cim cio cir cis cmc cme cmf cmg cmi cmm cmo cmr cms co- coc coe cof cog coi com coo cor cos crc cre crf crg cri crm cro crr crs csc cse csf csg csi csm cso csr css ec- ecc ece ecf ecg eci ecm eco ecr ecs eec eee eef eeg eem eeo eer ees ef- efc efe eff efg efi efm efo efr efs egc ege egf egg egi egm ego egr egs eic eie eif eig eii eim eio eir eis em- emc eme emf emg emi emm emo emr ems eo- eoc eoe eof eog eoi eom eoo eor eos erc ere erf erg eri erm ero err ers es- esc ese esf esg esi esm eso esr ess fcc fce fcf fcg fci fcm fco fcr fcs fec fee fef feg fei fem feo fer fes ffc ffe fff ffg ffi ffm ffo ffr ffs fgc fge fgf fgg fgi fgm fgr fgs fic fie fif fig fii fim fir fis fmc fme fmf fmg fmi fmm fmo fmr fms foc foe fof fog foi fom foo for fos frc fre frf frg fri frm fro frr frs fsc fse fsf fsg fsi fsm fso fsr fss gcc gce gcf gcg gci gcm gco gcr gcs ge- gec gee gef geg gei gem geo ger ges gfc gfe gff gfi gfm gfo gfr gfs ggc ggg ggi ggm ggo ggr ggs gic gie gif gig gii gim gio gir gis gmc gme gmf gmg gmi gmm gmo gmr gms goc goe gof gog goi gom goo gor gos grc gre grf grg gri grm gro grr grs gsc gse gsf gsg gsi gsm gso gsr gss i-f icc ice icf icg ici icm ico icr ics ie- iec iee ief ieg iei iem ier ies ifc ife iff ifg ifi ifm ifo ifr ifs igc ige igf igg igi igm igo igr igs iic iie iif iii iim iio iir iis im- imc ime imf img imi imm imo ims io- ioc ioe iof iog ioi iom ioo ior ios ir- irc ire irf irg iri irm iro irr irs is- isc ise isf isg isi ism iso isr iss m-f m-o m-r mc- mcc mce mcf mcg mci mcm mco mcr mcs mec mee mef meg mei mem meo mer mes mfc mfe mff mfg mfi mfm mfo mfr mfs mgc mge mgf mgi mgm mgo mgr mgs mi- mic mie mif mig mii mim mio mir mis mmc mme mmf mmg mmi mmm mmo mmr mms moc moe mof mog moi mom moo mor mos mrc mre mrf mrg mri mrm mro mrr mrs msc mse msf msg msi msm mso msr mss o-i oc- occ ocf ocg oci ocm oco ocr ocs oec oee oef oeg oei oem oeo oer oes of- ofc ofe off ofg ofi ofm ofo ofr ofs ogc oge ogf ogg ogi ogo ogs oic oie oif oii oim oio oir ois om- omc ome omf omg omi omm omo omr oms oo- ooc oof oog ooi oom ooo oor oos or- orc ore orf org ori orm oro orr ors os- osc ose osf osg osi osm oso osr oss rcc rce rcf rcg rci rcm rco rcr rcs re- rec ree ref reg rei rem reo rer res rfc rfe rff rfg rfi rfm rfo rfr rfs rgc rge rgf rgg rgi rgo rgr rgs ric rie rif rig rii rim rio rir ris rmc rme rmf rmg rmi rmm rmo rmr rms roc roe rof rog roi rom roo ror ros rrc rrf rrg rri rrm rrr rrs rsc rse rsf rsg rsi rsm rso rsr rss scc sce scf scg sci scm sco scr scs se- sec see sef seg sei sem seo ser ses sfc sfe sff sfg sfi sfm sfo sfr sfs sgc sge sgf sgg sgi sgm sgo sgr sgs sic sie sif sig sii sim sio sir sis smc sme smf smg smi smm smo smr sms soc soe sof sog soi som soo sor sos sr- src sre srf srg sri srm sro srr srs ss- ssc sse ssf ssg ssi ssm sso ssr sss