-er a-a a-c aaa aac aae aag aam aan aap aar ac- aca acc ace acg acm acn acp acr aea aec aee aeg aem aen aep aer ag- aga agc age agg agm agn agp agr ama amc ame amg amm amn amp amr an- ana anc ane ang anm ann anp anr ap- apa apc ape apg apm apn app apr ar- ara arc are arg arm arn arp arr c-- caa cac cae cag cam can cap car cca ccc cce ccg ccm ccn ccp ccr ce- cea cec cee ceg cem cen cep cer cga cgc cge cgg cgm cgn cgp cgr cma cmc cme cmg cmm cmn cmp cmr cn- cna cnc cne cng cnm cnn cnp cnr cpa cpc cpe cpg cpm cpn cpp cpr cra crc cre crg crm crn crp crr eaa eac eae eag eam ean eap ear ec- eca ecc ece ecg ecm ecn ecr eea eec eee eeg eem een eep eer ega egc ege egg egm egn egp egr em- ema emc eme emg emm emn emp emr en- ena enc ene eng enm enn enp enr ep- epa epc epe epg epm epn epp epr era erc ere erg erm ern erp err g-p gaa gac gae gag gam gan gap gar gca gcc gce gcg gcm gcn gcp gcr ge- gea gec gee geg gem gen gep ger gga ggc ggg ggm ggn ggp ggr gma gmc gme gmg gmm gmn gmp gmr gna gnc gne gnm gnn gnp gnr gpa gpc gpe gpg gpm gpn gpp gpr gra grc gre grg grm grn grp grr m-r maa mac mae mag mam man map mar mc- mca mcc mce mcg mcm mcn mcp mcr mea mec mee meg mem men mep mer mga mgc mge mgm mgn mgp mgr mma mmc mme mmg mmm mmn mmp mmr mna mnc mne mng mnm mnn mnp mnr mpa mpc mpe mpg mpm mpn mpp mpr mra mrc mre mrg mrm mrn mrp mrr naa nac nae nag nam nan nap nar nca ncc nce ncg ncm ncn ncp ncr ne- nea nec nee neg nem nen nep ner nga ngc nge ngg ngm ngn ngp nma nmc nme nmg nmm nmn nmp nmr nna nnc nne nng nnm nnn nnp npa npc npe npg npm npn npp npr nra nrc nre nrg nrm nrn nrp nrr p-p paa pac pae pag pam pan pap par pca pcc pce pcg pcm pcn pcp pcr pea pec pee peg pem pen pep per pga pgc pge pgg pgm pgn pgp pgr pma pmc pme pmg pmm pmn pmp pmr pn- pna pnc pne png pnm pnn pnp pnr ppa ppc ppe ppg ppm ppn ppp ppr pra prc pre prg prm prn prp prr ra- raa rac rae rag ram ran rap rar rca rcc rce rcg rcm rcn rcp rcr re- rea rec ree reg rem ren rep rer rga rgc rge rgg rgn rgp rgr rma rmc rme rmg rmm rmn rmp rmr rna rnc rng rnm rnn rnp rnr rpa rpc rpe rpg rpm rpn rpp rpr rra rrc rrg rrm rrn rrp rrr