-er -ic c-- ccc cce ccf cci ccn cco ccp ccr ccs ce- cec cee cef cei cen ceo cep cer ces cfc cfe cff cfi cfn cfo cfp cfr cfs ci- cic cie cif cii cin cio cip cir cis cn- cnc cne cnf cni cnn cno cnp cnr cns co- coc coe cof coi con coo cop cor cos cpc cpe cpf cpi cpn cpo cpp cpr cps crc cre crf cri crn cro crp crr crs csc cse csf csi csn cso csp csr css ec- ecc ece ecf eci ecn eco ecr ecs eec eee eef een eeo eep eer ees ef- efc efe eff efi efo efp efr efs eic eie eif eii ein eio eip eir eis en- enc ene enf eni enn eno enp enr ens eo- eoc eoe eof eoi eon eoo eop eor eos ep- epc epe epf epi epn epo epp epr eps erc ere erf eri ern ero erp err ers es- esc ese esf esi esn eso esp esr ess fcc fce fcf fci fcn fco fcp fcr fcs fec fee fef fei fen feo fep fer fes ffc ffe fff ffi ffn ffo ffp ffr ffs fic fie fif fii fin fip fir fis fnc fne fnf fni fnn fnp fnr fns foc foe fof foi fon foo fop for fos fpc fpe fpi fpn fpo fpp fpr fps frc fre frf fri frn fro frp frr frs fsc fse fsf fsi fsn fso fsp fsr fss i-f icc ice icf ici icn ico icp icr ics ie- iec iee ief iei ien iep ier ies ifc ife iff ifi ifn ifo ifp ifr ifs iic iie iif iii iin iio iip iir iis in- inc ine inf ini inn ino inp inr ins io- ioc ioe iof ioi ion ioo iop ior ios ipc ipe ipf ipi ipn ipo ipp ipr ips ir- irc ire irf iri irn iro irp irr irs is- isc ise isf isi isn iso isp isr iss n-i ncc nce ncf nci ncn nco ncp ncr ncs ne- nec nee nef nei nen neo nep ner nes nfc nfe nff nfi nfn nfo nfp nfr nfs nic nie nif nii nin nio nip nir nis nnc nne nnf nni nnn nno nnp nns no- noc noe nof noi non noo nop nor nos npc npe npf npi npn npo npp npr nps nrc nre nrf nri nrn nro nrp nrr nrs nsc nse nsf nsi nsn nso nsp nsr nss o-i oc- occ ocf oci ocn oco ocp ocr ocs oec oee oef oei oen oeo oep oer oes of- ofc ofe off ofi ofn ofo ofp ofr ofs oic oie oif oii oin oio oip oir ois on- onc one onf oni onn ono onp onr ons oo- ooc oof ooi oon ooo oop oor oos op- opc ope opf opi opn opo opp opr ops or- orc ore orf ori orn oro orp orr ors os- osc ose osf osi osn oso osp osr oss p-p pcc pce pcf pci pcn pco pcp pcr pcs pec pee pef pei pen peo pep per pes pfc pfe pff pfi pfn pfo pfp pfr pfs pic pie pif pii pin pio pip pir pis pn- pnc pne pnf pni pnn pno pnp pnr pns poc poe pof poi pon poo pop por pos ppc ppe ppf ppi ppn ppo ppp ppr pps prc pre prf pri prn pro prp prr prs ps- psc pse psf psi psn pso psp psr pss rcc rce rcf rci rcn rco rcp rcr rcs re- rec ree ref rei ren reo rep rer res rfc rfe rff rfi rfn rfo rfp rfr rfs ric rie rif rii rin rio rip rir ris rnc rni rnn rno rnp rnr rns roc roe rof roi ron roo rop ror ros rpc rpe rpf rpi rpn rpo rpp rpr rps rrc rrf rri rrn rrp rrr rrs rsc rse rsf rsi rsn rso rsp rsr rss scc sce scf sci scn sco scp scr scs se- sec see sef sei sen seo sep ser ses sfc sfe sff sfi sfn sfo sfp sfr sfs sic sie sif sii sin sio sip sir sis snc sne snf sni snn sno snp snr sns soc soe sof soi son soo sop sor sos spc spe spf spi spn spo spp spr sps sr- src sre srf sri srn sro srp srr srs ss- ssc sse ssf ssi ssn sso ssp ssr sss