-al -ol a-a a-c aaa aac aaf aag aal aan aao ac- aca acc acf acg acl acn aco af- afa afc aff afg afl afn afo ag- aga agc agf agg agl agn ago al- ala alc alf alg all aln alo an- ana anc anf ang anl ann ano aoa aoc aof aog aol aon aoo c-- caa cac caf cag cal can cao cca ccc ccf ccg ccl ccn cco cfa cfc cff cfg cfl cfn cfo cga cgc cgg cgl cgn cgo cl- cla clc clf clg cll cln clo cn- cna cnc cnf cng cnl cnn cno co- coa coc cof cog col con coo faa fac faf fag fal fan fao fca fcc fcf fcg fcl fcn fco ffa ffc fff ffg ffl ffn ffo fga fgc fgf fgg fgl fgn fla flc flf flg fll fln flo fna fnc fnf fng fnl fnn foa foc fof fog fol fon foo gaa gac gaf gag gal gan gao gca gcc gcf gcg gcl gcn gco gfa gfc gff gfl gfo gga ggc ggg ggn ggo gla glc glf glg gll gln glo gna gnc gnf gnl gnn gno goa goc gof gog gol gon goo la- laa lac laf lag lal lan lao lca lcc lcf lcg lcl lcn lco lfa lfc lff lfg lfl lfn lfo lga lgc lgf lgg lgl lgn lgo lla llc llf llg lll lln llo lna lnc lng lnl lnn lno loa loc lof log lol lon loo naa nac naf nag nal nan nao nca ncc ncf ncg ncl ncn nco nfa nfc nff nfl nfn nfo nga ngc ngf ngg ngl ngn ngo nla nlc nlf nlg nll nln nlo nna nnc nnf nng nnl nnn nno no- noa noc nof nog nol non noo oaa oac oaf oag oal oan oao oc- oca occ ocf ocg ocl ocn oco of- ofa ofc off ofg ofl ofn ofo oga ogc ogf ogg ogl ogn ogo ola olc olf olg oll oln olo on- ona onc onf ong onl onn ono oo- ooa ooc oof oog ool oon ooo