-al a-a a-c aaa aac aaf aal aan ac- aca acc acf acl acn af- afa afc aff afl afn al- ala alc alf all aln an- ana anc anf anl ann c-- caa cac caf cal can cca ccc ccf ccl ccn cfa cfc cff cfl cfn cl- cla clc clf cll cln cn- cna cnc cnf cnl cnn faa fac faf fal fan fca fcc fcf fcl fcn ffa ffc fff ffl ffn fla flc flf fll fln fna fnc fnf fnl fnn la- laa lac laf lal lan lca lcc lcf lcl lcn lfa lfc lff lfl lfn lla llc llf lll lln lna lnc lnl lnn naa nac naf nal nan nca ncc ncf ncl ncn nfa nfc nff nfl nfn nla nlc nlf nll nln nna nnc nnf nnl nnn