a-a aaa aaf aag aam aan aas af- afa aff afg afm afn afs ag- aga agf agg agm agn ags ama amf amg amm amn ams an- ana anf ang anm ann ans as- asa asf asg asm asn ass faa faf fag fam fan fas ffa fff ffg ffm ffn ffs fga fgf fgg fgm fgn fgs fma fmf fmg fmm fmn fms fna fnf fng fnm fnn fns fsa fsf fsg fsm fsn fss gaa gaf gag gam gan gas gfa gff gfm gfs gga ggg ggm ggn ggs gma gmf gmg gmm gmn gms gna gnf gnm gnn gns gsa gsf gsg gsm gsn gss m-f maa maf mag mam man mas mfa mff mfg mfm mfn mfs mga mgf mgm mgn mgs mma mmf mmg mmm mmn mms mna mnf mng mnm mnn mns msa msf msg msm msn mss naa naf nag nam nan nas nfa nff nfn nfs nga ngf ngg ngm ngn ngs nma nmg nmm nmn nms nna nnf nng nnm nnn nns nsa nsf nsg nsm nsn nss saa saf sag sam san sas sfa sff sfg sfm sfn sfs sga sgf sgg sgm sgn sgs sma smf smg smm smn sms sna snf sng snm snn sns ss- ssa ssf ssg ssm ssn sss