-er a-a a-c aaa aac aad aae aag aan aap aar ac- aca acc acd ace acg acn acp acr ad- ada adc add ade adg adn adp adr aea aec aed aee aeg aen aep aer ag- aga agc agd age agg agn agp agr an- ana anc and ane ang ann anp anr ap- apa apc apd ape apg apn app apr ar- ara arc ard are arg arn arp arr c-- caa cac cad cae cag can cap car cca ccc ccd cce ccg ccn ccp ccr cda cdc cdd cde cdg cdn cdp cdr ce- cea cec ced cee ceg cen cep cer cga cgc cgd cge cgg cgn cgp cgr cn- cna cnc cnd cne cng cnn cnp cnr cpa cpc cpd cpe cpg cpn cpp cpr cra crc crd cre crg crn crp crr daa dac dad dae dag dan dap dar dca dcc dcd dce dcg dcn dcp dcr dda ddc ddd dde ddg ddn ddp ddr de- dea dec ded dee deg den dep der dga dgc dgd dge dgg dgn dgp dgr dna dnc dnd dne dng dnn dnp dnr dpa dpc dpd dpe dpg dpn dpp dpr dra drc drd dre drg drn drp drr eaa eac ead eae eag ean eap ear ec- eca ecc ecd ece ecg ecn ecr ed- eda edc edd ede edg edn edp edr eea eec eed eee eeg een eep eer ega egc egd ege egg egn egp egr en- ena enc end ene eng enn enp enr ep- epa epc epd epe epg epn epp epr era erc erd ere erg ern erp err g-d g-p gaa gac gad gae gag gan gap gar gca gcc gcd gce gcg gcn gcp gcr gda gdc gdd gde gdn gdp gdr ge- gea gec ged gee geg gen gep ger gga ggc ggd ggg ggn ggp ggr gna gnc gnd gne gnn gnp gnr gpa gpc gpd gpe gpg gpn gpp gpr gra grc grd gre grg grn grp grr naa nac nad nae nag nan nap nar nca ncc ncd nce ncg ncn ncp ncr nda ndc ndd nde ndg ndn ndp ndr ne- nea nec ned nee neg nen nep ner nga ngc ngd nge ngg ngn ngp nna nnc nne nng nnn nnp npa npc npd npe npg npn npp npr nra nrc nrd nre nrg nrn nrp nrr p-p paa pac pad pae pag pan pap par pca pcc pcd pce pcg pcn pcp pcr pda pdc pdd pde pdg pdn pdp pdr pea pec ped pee peg pen pep per pga pgc pgd pge pgg pgn pgp pgr pn- pna pnc pnd pne png pnn pnp pnr ppa ppc ppd ppe ppg ppn ppp ppr pra prc prd pre prg prn prp prr ra- raa rac rad rae rag ran rap rar rca rcc rcd rce rcg rcn rcp rcr rda rdc rdd rde rdg rdn rdp rdr re- rea rec red ree reg ren rep rer rga rgc rgd rge rgg rgn rgp rgr rna rnc rnd rng rnn rnp rnr rpa rpc rpd rpe rpg rpn rpp rpr rra rrc rrd rrg rrn rrp rrr