-er -ic c-- ccc cce ccg cci ccn ccp ccr ce- cec cee ceg cei cen cep cer cgc cge cgg cgi cgn cgp cgr ci- cic cie cig cii cin cip cir cn- cnc cne cng cni cnn cnp cnr cpc cpe cpg cpi cpn cpp cpr crc cre crg cri crn crp crr ec- ecc ece ecg eci ecn ecr eec eee eeg een eep eer egc ege egg egi egn egp egr eic eie eig eii ein eip eir en- enc ene eng eni enn enp enr ep- epc epe epg epi epn epp epr erc ere erg eri ern erp err g-p gcc gce gcg gci gcn gcp gcr ge- gec gee geg gei gen gep ger ggc ggg ggi ggn ggp ggr gic gie gig gii gin gip gir gnc gne gni gnn gnp gnr gpc gpe gpg gpi gpn gpp gpr grc gre grg gri grn grp grr icc ice icg ici icn icp icr ie- iec iee ieg iei ien iep ier igc ige igg igi ign igp igr iic iie iii iin iip iir in- inc ine ing ini inn inp inr ipc ipe ipg ipi ipn ipp ipr ir- irc ire irg iri irn irp irr n-i ncc nce ncg nci ncn ncp ncr ne- nec nee neg nei nen nep ner ngc nge ngg ngi ngn ngp nic nie nig nii nin nip nir nnc nne nng nni nnn nnp npc npe npg npi npn npp npr nrc nre nrg nri nrn nrp nrr p-p pcc pce pcg pci pcn pcp pcr pec pee peg pei pen pep per pgc pge pgg pgi pgn pgp pgr pic pie pig pii pin pip pir pn- pnc pne png pni pnn pnp pnr ppc ppe ppg ppi ppn ppp ppr prc pre prg pri prn prp prr rcc rce rcg rci rcn rcp rcr re- rec ree reg rei ren rep rer rgc rge rgg rgi rgn rgp rgr ric rie rig rii rin rip rir rnc rng rni rnn rnp rnr rpc rpe rpg rpi rpn rpp rpr rrc rrg rri rrn rrp rrr