a-a aaa aaf aag aam aan aar af- afa aff afg afm afn afr ag- aga agf agg agm agn agr ama amf amg amm amn amr an- ana anf ang anm ann anr ar- ara arf arg arm arn arr faa faf fag fam fan far ffa fff ffg ffm ffn ffr fga fgf fgg fgm fgn fgr fma fmf fmg fmm fmn fmr fna fnf fng fnm fnn fnr fra frf frg frm frn frr gaa gaf gag gam gan gar gfa gff gfm gfr gga ggg ggm ggn ggr gma gmf gmg gmm gmn gmr gna gnf gnm gnn gnr gra grf grg grm grn grr m-f m-r maa maf mag mam man mar mfa mff mfg mfm mfn mfr mga mgf mgm mgn mgr mma mmf mmg mmm mmn mmr mna mnf mng mnm mnn mnr mra mrf mrg mrm mrn mrr naa naf nag nam nan nar nfa nff nfn nfr nga ngf ngg ngm ngn nma nmg nmm nmn nmr nna nnf nng nnm nnn nra nrf nrg nrm nrn nrr ra- raa raf rag ram ran rar rfa rff rfg rfm rfn rfr rga rgf rgg rgn rgr rma rmf rmg rmm rmn rmr rna rng rnm rnn rnr rra rrf rrg rrm rrn rrr