-al a-a a-c aaa aac aae aag aak aal aan aas ac- aca acc ace acg ack acl acn acs aea aec aee aeg aek ael aen aes ag- aga agc age agg agk agl agn ags aka akc ake akg akk akl akn aks al- ala alc ale alg alk all aln als an- ana anc ane ang ank anl ann ans as- asa asc ase asg ask asl asn ass c-- caa cac cae cag cak cal can cas cca ccc cce ccg cck ccl ccn ccs ce- cea cec cee ceg cek cel cen ces cga cgc cge cgg cgl cgn cgs cka ckc cks cl- cla clc cle clg clk cll cln cls cn- cna cnc cne cng cnl cnn cns csa csc cse csg csk csl csn css eaa eac eae eag eak eal ean eas ec- eca ecc ece ecg eck ecl ecn ecs eea eec eee eeg eek eel een ees ega egc ege egg egl egn egs eka ekc eke ekg ekl eks ela elc ele elg elk ell eln els en- ena enc ene eng enk enl enn ens es- esa esc ese esg esk esl esn ess gaa gac gae gag gak gal gan gas gca gcc gce gcg gck gcl gcn gcs ge- gea gec gee geg gek gel gen ges gga ggc ggg ggn ggs gka gkn gks gla glc gle glg glk gll gln gls gna gnc gne gnl gnn gns gsa gsc gse gsg gsk gsl gsn gss ka- kaa kac kae kag kak kal kan kas kca kcc kce kcg kck kcl kcn kcs ke- kea kec kee keg kek kel ken kes kga kgc kgl kgs kkc kke kkk kkl kkn kks kl- kla klc klg kls kn- kna knc kne kng knk knl knn ksa ksc kse ksg ksk ksl ksn kss la- laa lac lae lag lak lal lan las lca lcc lce lcg lck lcl lcn lcs lea lec lee leg lek lel len les lga lgc lge lgg lgk lgl lgn lgs lka lkg lkl lks lla llc lle llg llk lll lln lls lna lnc lne lng lnk lnl lnn lns lsa lsc lse lsg lsk lsl lsn lss naa nac nae nag nak nal nan nas nca ncc nce ncg nck ncl ncn ncs ne- nea nec nee neg nek nel nen nes nga ngc nge ngg ngk ngl ngn ngs nka nkc nke nkk nkn nks nla nlc nle nlg nlk nll nln nls nna nnc nne nng nnk nnl nnn nns nsa nsc nse nsg nsk nsl nsn nss saa sac sae sag sak sal san sas sca scc sce scg sck scl scn scs se- sea sec see seg sek sel sen ses sga sgc sge sgg sgk sgl sgn sgs sk- ska skc ske skg skk skl sks sla slc sle slg slk sll sln sls sna snc sne sng snk snl snn sns ss- ssa ssc sse ssg ssk ssl ssn sss