-er -ic c-- ccc cce ccg cci ccn cco ccp ccr ccs ce- cec cee ceg cei cen ceo cep cer ces cgc cge cgg cgi cgn cgo cgp cgr cgs ci- cic cie cig cii cin cio cip cir cis cn- cnc cne cng cni cnn cno cnp cnr cns co- coc coe cog coi con coo cop cor cos cpc cpe cpg cpi cpn cpo cpp cpr cps crc cre crg cri crn cro crp crr crs csc cse csg csi csn cso csp csr css ec- ecc ece ecg eci ecn eco ecr ecs eec eee eeg een eeo eep eer ees egc ege egg egi egn ego egp egr egs eic eie eig eii ein eio eip eir eis en- enc ene eng eni enn eno enp enr ens eo- eoc eoe eog eoi eon eoo eop eor eos ep- epc epe epg epi epn epo epp epr eps erc ere erg eri ern ero erp err ers es- esc ese esg esi esn eso esp esr ess g-p gcc gce gcg gci gcn gco gcp gcr gcs ge- gec gee geg gei gen geo gep ger ges ggc ggg ggi ggn ggo ggp ggr ggs gic gie gig gii gin gio gip gir gis gnc gne gni gnn gno gnp gnr gns goc goe gog goi gon goo gop gor gos gpc gpe gpg gpi gpn gpo gpp gpr gps grc gre grg gri grn gro grp grr grs gsc gse gsg gsi gsn gso gsp gsr gss icc ice icg ici icn ico icp icr ics ie- iec iee ieg iei ien iep ier ies igc ige igg igi ign igo igp igr igs iic iie iii iin iio iip iir iis in- inc ine ing ini inn ino inp inr ins io- ioc ioe iog ioi ion ioo iop ior ios ipc ipe ipg ipi ipn ipo ipp ipr ips ir- irc ire irg iri irn iro irp irr irs is- isc ise isg isi isn iso isp isr iss n-i ncc nce ncg nci ncn nco ncp ncr ncs ne- nec nee neg nei nen neo nep ner nes ngc nge ngg ngi ngn ngo ngp ngs nic nie nig nii nin nio nip nir nis nnc nne nng nni nnn nno nnp nns no- noc noe nog noi non noo nop nor nos npc npe npg npi npn npo npp npr nps nrc nre nrg nri nrn nro nrp nrr nrs nsc nse nsg nsi nsn nso nsp nsr nss o-i oc- occ ocg oci ocn oco ocp ocr ocs oec oee oeg oei oen oeo oep oer oes ogc oge ogg ogi ogn ogo ogp ogs oic oie oii oin oio oip oir ois on- onc one ong oni onn ono onp onr ons oo- ooc oog ooi oon ooo oop oor oos op- opc ope opg opi opn opo opp opr ops or- orc ore org ori orn oro orp orr ors os- osc ose osg osi osn oso osp osr oss p-p pcc pce pcg pci pcn pco pcp pcr pcs pec pee peg pei pen peo pep per pes pgc pge pgg pgi pgn pgo pgp pgr pgs pic pie pig pii pin pio pip pir pis pn- pnc pne png pni pnn pno pnp pnr pns poc poe pog poi pon poo pop por pos ppc ppe ppg ppi ppn ppo ppp ppr pps prc pre prg pri prn pro prp prr prs ps- psc pse psg psi psn pso psp psr pss rcc rce rcg rci rcn rco rcp rcr rcs re- rec ree reg rei ren reo rep rer res rgc rge rgg rgi rgn rgo rgp rgr rgs ric rie rig rii rin rio rip rir ris rnc rng rni rnn rno rnp rnr rns roc roe rog roi ron roo rop ror ros rpc rpe rpg rpi rpn rpo rpp rpr rps rrc rrg rri rrn rrp rrr rrs rsc rse rsg rsi rsn rso rsp rsr rss scc sce scg sci scn sco scp scr scs se- sec see seg sei sen seo sep ser ses sgc sge sgg sgi sgn sgo sgp sgr sgs sic sie sig sii sin sio sip sir sis snc sne sng sni snn sno snp snr sns soc soe sog soi son soo sop sor sos spc spe spg spi spn spo spp spr sps sr- src sre srg sri srn sro srp srr srs ss- ssc sse ssg ssi ssn sso ssp ssr sss