a-a aaa aaf aag aam aan aao af- afa aff afg afm afn afo ag- aga agf agg agm agn ago ama amf amg amm amn amo an- ana anf ang anm ann ano aoa aof aog aom aon aoo faa faf fag fam fan fao ffa fff ffg ffm ffn ffo fga fgf fgg fgm fgn fma fmf fmg fmm fmn fmo fna fnf fng fnm fnn foa fof fog fom fon foo gaa gaf gag gam gan gao gfa gff gfm gfo gga ggg ggm ggn ggo gma gmf gmg gmm gmn gmo gna gnf gnm gnn gno goa gof gog gom gon goo m-f m-o maa maf mag mam man mao mfa mff mfg mfm mfn mfo mga mgf mgm mgn mgo mma mmf mmg mmm mmn mmo mna mnf mng mnm mnn mno moa mof mog mom mon moo naa naf nag nam nan nao nfa nff nfn nfo nga ngf ngg ngm ngn ngo nma nmg nmm nmn nmo nna nnf nng nnm nnn nno no- noa nof nog nom non noo oaa oaf oag oam oan oao of- ofa off ofg ofm ofn ofo oga ogf ogg ogn ogo om- oma omf omg omm omn omo on- ona onf ong onn ono oo- ooa oof oog oom oon ooo