a-a aaa aaf aag aam aar af- afa aff afg afm afr ag- aga agf agg agm agr ama amf amg amm amr ar- ara arf arg arm arr faa faf fag fam far ffa fff ffg ffm ffr fga fgf fgg fgm fgr fma fmf fmg fmm fmr fra frf frg frm frr gaa gaf gag gam gar gfa gff gfm gfr gga ggg ggm ggr gma gmf gmg gmm gmr gra grf grg grm grr m-f m-r maa maf mag mam mar mfa mff mfg mfm mfr mga mgf mgm mgr mma mmf mmg mmm mmr mra mrf mrg mrm mrr ra- raa raf rag ram rar rfa rff rfg rfm rfr rga rgf rgg rgr rma rmf rmg rmm rmr rra rrf rrg rrm rrr