-er -ic c-- ccc cce ccf cci ccm cco ccp ccr ccs ce- cec cee cef cei cem ceo cep cer ces cfc cfe cff cfi cfm cfo cfp cfr cfs ci- cic cie cif cii cim cio cip cir cis cmc cme cmf cmi cmm cmo cmp cmr cms co- coc coe cof coi com coo cop cor cos cpc cpe cpf cpi cpm cpo cpp cpr cps crc cre crf cri crm cro crp crr crs csc cse csf csi csm cso csp csr css ec- ecc ece ecf eci ecm eco ecr ecs eec eee eef eem eeo eep eer ees ef- efc efe eff efi efm efo efp efr efs eic eie eif eii eim eio eip eir eis em- emc eme emf emi emm emo emp emr ems eo- eoc eoe eof eoi eom eoo eop eor eos ep- epc epe epf epi epm epo epp epr eps erc ere erf eri erm ero erp err ers es- esc ese esf esi esm eso esp esr ess fcc fce fcf fci fcm fco fcp fcr fcs fec fee fef fei fem feo fep fer fes ffc ffe fff ffi ffm ffo ffp ffr ffs fic fie fif fii fim fip fir fis fmc fme fmf fmi fmm fmo fmp fmr fms foc foe fof foi fom foo fop for fos fpc fpe fpi fpm fpo fpp fpr fps frc fre frf fri frm fro frp frr frs fsc fse fsf fsi fsm fso fsp fsr fss i-f icc ice icf ici icm ico icp icr ics ie- iec iee ief iei iem iep ier ies ifc ife iff ifi ifm ifo ifp ifr ifs iic iie iif iii iim iio iip iir iis im- imc ime imf imi imm imo imp ims io- ioc ioe iof ioi iom ioo iop ior ios ipc ipe ipf ipi ipm ipo ipp ipr ips ir- irc ire irf iri irm iro irp irr irs is- isc ise isf isi ism iso isp isr iss m-f m-o m-r mc- mcc mce mcf mci mcm mco mcp mcr mcs mec mee mef mei mem meo mep mer mes mfc mfe mff mfi mfm mfo mfp mfr mfs mi- mic mie mif mii mim mio mip mir mis mmc mme mmf mmi mmm mmo mmp mmr mms moc moe mof moi mom moo mop mor mos mpc mpe mpf mpi mpm mpo mpp mpr mps mrc mre mrf mri mrm mro mrp mrr mrs msc mse msf msi msm mso msp msr mss o-i oc- occ ocf oci ocm oco ocp ocr ocs oec oee oef oei oem oeo oep oer oes of- ofc ofe off ofi ofm ofo ofp ofr ofs oic oie oif oii oim oio oip oir ois om- omc ome omf omi omm omo omp omr oms oo- ooc oof ooi oom ooo oop oor oos op- opc ope opf opi opm opo opp opr ops or- orc ore orf ori orm oro orp orr ors os- osc ose osf osi osm oso osp osr oss p-p pcc pce pcf pci pcm pco pcp pcr pcs pec pee pef pei pem peo pep per pes pfc pfe pff pfi pfm pfo pfp pfr pfs pic pie pif pii pim pio pip pir pis pmc pme pmf pmi pmm pmo pmp pmr pms poc poe pof poi pom poo pop por pos ppc ppe ppf ppi ppm ppo ppp ppr pps prc pre prf pri prm pro prp prr prs ps- psc pse psf psi psm pso psp psr pss rcc rce rcf rci rcm rco rcp rcr rcs re- rec ree ref rei rem reo rep rer res rfc rfe rff rfi rfm rfo rfp rfr rfs ric rie rif rii rim rio rip rir ris rmc rme rmf rmi rmm rmo rmp rmr rms roc roe rof roi rom roo rop ror ros rpc rpe rpf rpi rpm rpo rpp rpr rps rrc rrf rri rrm rrp rrr rrs rsc rse rsf rsi rsm rso rsp rsr rss scc sce scf sci scm sco scp scr scs se- sec see sef sei sem seo sep ser ses sfc sfe sff sfi sfm sfo sfp sfr sfs sic sie sif sii sim sio sip sir sis smc sme smf smi smm smo smp smr sms soc soe sof soi som soo sop sor sos spc spe spf spi spm spo spp spr sps sr- src sre srf sri srm sro srp srr srs ss- ssc sse ssf ssi ssm sso ssp ssr sss