-al a-a a-c aaa aac aaf aag aal aan ac- aca acc acf acg acl acn af- afa afc aff afg afl afn ag- aga agc agf agg agl agn al- ala alc alf alg all aln an- ana anc anf ang anl ann c-- caa cac caf cag cal can cca ccc ccf ccg ccl ccn cfa cfc cff cfg cfl cfn cga cgc cgg cgl cgn cl- cla clc clf clg cll cln cn- cna cnc cnf cng cnl cnn faa fac faf fag fal fan fca fcc fcf fcg fcl fcn ffa ffc fff ffg ffl ffn fga fgc fgf fgg fgl fgn fla flc flf flg fll fln fna fnc fnf fng fnl fnn gaa gac gaf gag gal gan gca gcc gcf gcg gcl gcn gfa gfc gff gfl gga ggc ggg ggn gla glc glf glg gll gln gna gnc gnf gnl gnn la- laa lac laf lag lal lan lca lcc lcf lcg lcl lcn lfa lfc lff lfg lfl lfn lga lgc lgf lgg lgl lgn lla llc llf llg lll lln lna lnc lng lnl lnn naa nac naf nag nal nan nca ncc ncf ncg ncl ncn nfa nfc nff nfl nfn nga ngc ngf ngg ngl ngn nla nlc nlf nlg nll nln nna nnc nnf nng nnl nnn