-al a-a a-c aaa aac aaf aag aal aas ac- aca acc acf acg acl acs af- afa afc aff afg afl afs ag- aga agc agf agg agl ags al- ala alc alf alg all als as- asa asc asf asg asl ass c-- caa cac caf cag cal cas cca ccc ccf ccg ccl ccs cfa cfc cff cfg cfl cfs cga cgc cgg cgl cgs cl- cla clc clf clg cll cls csa csc csf csg csl css faa fac faf fag fal fas fca fcc fcf fcg fcl fcs ffa ffc fff ffg ffl ffs fga fgc fgf fgg fgl fgs fla flc flf flg fll fls fsa fsc fsf fsg fsl fss gaa gac gaf gag gal gas gca gcc gcf gcg gcl gcs gfa gfc gff gfl gfs gga ggc ggg ggs gla glc glf glg gll gls gsa gsc gsf gsg gsl gss la- laa lac laf lag lal las lca lcc lcf lcg lcl lcs lfa lfc lff lfg lfl lfs lga lgc lgf lgg lgl lgs lla llc llf llg lll lls lsa lsc lsf lsg lsl lss saa sac saf sag sal sas sca scc scf scg scl scs sfa sfc sff sfg sfl sfs sga sgc sgf sgg sgl sgs sla slc slf slg sll sls ss- ssa ssc ssf ssg ssl sss