-er -ic a-a a-c a-i aaa aac aae aag aai aao aap aar ac- aca acc ace acg aci aco acp acr aea aec aee aeg aei aeo aep aer ag- aga agc age agg agi ago agp agr ai- aia aic aie aig aii aio aip air aoa aoc aoe aog aoi aoo aop aor ap- apa apc ape apg api apo app apr ar- ara arc are arg ari aro arp arr c-- caa cac cae cag cai cao cap car cca ccc cce ccg cci cco ccp ccr ce- cea cec cee ceg cei ceo cep cer cga cgc cge cgg cgi cgo cgp cgr ci- cia cic cie cig cii cio cip cir co- coa coc coe cog coi coo cop cor cpa cpc cpe cpg cpi cpo cpp cpr cra crc cre crg cri cro crp crr eaa eac eae eag eai eao eap ear ec- eca ecc ece ecg eci eco ecr eea eec eee eeg eeo eep eer ega egc ege egg egi ego egp egr eia eic eie eig eii eio eip eir eo- eoa eoc eoe eog eoi eoo eop eor ep- epa epc epe epg epi epo epp epr era erc ere erg eri ero erp err g-p gaa gac gae gag gai gao gap gar gca gcc gce gcg gci gco gcp gcr ge- gea gec gee geg gei geo gep ger gga ggc ggg ggi ggo ggp ggr gia gic gie gig gii gio gip gir goa goc goe gog goi goo gop gor gpa gpc gpe gpg gpi gpo gpp gpr gra grc gre grg gri gro grp grr ia- iaa iac iae iag iai iao iap iar ica icc ice icg ici ico icp icr ie- iea iec iee ieg iei iep ier iga igc ige igg igi igo igp igr iia iic iie iii iio iip iir io- ioa ioc ioe iog ioi ioo iop ior ipa ipc ipe ipg ipi ipo ipp ipr ir- ira irc ire irg iri iro irp irr o-i oaa oac oae oag oai oao oap oar oc- oca occ ocg oci oco ocp ocr oea oec oee oeg oei oeo oep oer oga ogc oge ogg ogi ogo ogp oia oic oie oii oio oip oir oo- ooa ooc oog ooi ooo oop oor op- opa opc ope opg opi opo opp opr or- ora orc ore org ori oro orp orr p-p paa pac pae pag pai pao pap par pca pcc pce pcg pci pco pcp pcr pea pec pee peg pei peo pep per pga pgc pge pgg pgi pgo pgp pgr pia pic pie pig pii pio pip pir poa poc poe pog poi poo pop por ppa ppc ppe ppg ppi ppo ppp ppr pra prc pre prg pri pro prp prr ra- raa rac rae rag rai rao rap rar rca rcc rce rcg rci rco rcp rcr re- rea rec ree reg rei reo rep rer rga rgc rge rgg rgi rgo rgp rgr ria ric rie rig rii rio rip rir roa roc roe rog roi roo rop ror rpa rpc rpe rpg rpi rpo rpp rpr rra rrc rrg rri rrp rrr