-er -ic c-- ccc cce ccg cci cco ccp ccr ce- cec cee ceg cei ceo cep cer cgc cge cgg cgi cgo cgp cgr ci- cic cie cig cii cio cip cir co- coc coe cog coi coo cop cor cpc cpe cpg cpi cpo cpp cpr crc cre crg cri cro crp crr ec- ecc ece ecg eci eco ecr eec eee eeg eeo eep eer egc ege egg egi ego egp egr eic eie eig eii eio eip eir eo- eoc eoe eog eoi eoo eop eor ep- epc epe epg epi epo epp epr erc ere erg eri ero erp err g-p gcc gce gcg gci gco gcp gcr ge- gec gee geg gei geo gep ger ggc ggg ggi ggo ggp ggr gic gie gig gii gio gip gir goc goe gog goi goo gop gor gpc gpe gpg gpi gpo gpp gpr grc gre grg gri gro grp grr icc ice icg ici ico icp icr ie- iec iee ieg iei iep ier igc ige igg igi igo igp igr iic iie iii iio iip iir io- ioc ioe iog ioi ioo iop ior ipc ipe ipg ipi ipo ipp ipr ir- irc ire irg iri iro irp irr o-i oc- occ ocg oci oco ocp ocr oec oee oeg oei oeo oep oer ogc oge ogg ogi ogo ogp oic oie oii oio oip oir oo- ooc oog ooi ooo oop oor op- opc ope opg opi opo opp opr or- orc ore org ori oro orp orr p-p pcc pce pcg pci pco pcp pcr pec pee peg pei peo pep per pgc pge pgg pgi pgo pgp pgr pic pie pig pii pio pip pir poc poe pog poi poo pop por ppc ppe ppg ppi ppo ppp ppr prc pre prg pri pro prp prr rcc rce rcg rci rco rcp rcr re- rec ree reg rei reo rep rer rgc rge rgg rgi rgo rgp rgr ric rie rig rii rio rip rir roc roe rog roi roo rop ror rpc rpe rpg rpi rpo rpp rpr rrc rrg rri rrp rrr