a-a aaa aaf aag aam aan aao aar af- afa aff afg afm afn afo afr ag- aga agf agg agm agn ago agr ama amf amg amm amn amo amr an- ana anf ang anm ann ano anr aoa aof aog aom aon aoo aor ar- ara arf arg arm arn aro arr faa faf fag fam fan fao far ffa fff ffg ffm ffn ffo ffr fga fgf fgg fgm fgn fgr fma fmf fmg fmm fmn fmo fmr fna fnf fng fnm fnn fnr foa fof fog fom fon foo for fra frf frg frm frn fro frr gaa gaf gag gam gan gao gar gfa gff gfm gfo gfr gga ggg ggm ggn ggo ggr gma gmf gmg gmm gmn gmo gmr gna gnf gnm gnn gno gnr goa gof gog gom gon goo gor gra grf grg grm grn gro grr m-f m-o m-r maa maf mag mam man mao mar mfa mff mfg mfm mfn mfo mfr mga mgf mgm mgn mgo mgr mma mmf mmg mmm mmn mmo mmr mna mnf mng mnm mnn mno mnr moa mof mog mom mon moo mor mra mrf mrg mrm mrn mro mrr naa naf nag nam nan nao nar nfa nff nfn nfo nfr nga ngf ngg ngm ngn ngo nma nmg nmm nmn nmo nmr nna nnf nng nnm nnn nno no- noa nof nog nom non noo nor nra nrf nrg nrm nrn nro nrr oaa oaf oag oam oan oao oar of- ofa off ofg ofm ofn ofo ofr oga ogf ogg ogn ogo om- oma omf omg omm omn omo omr on- ona onf ong onn ono onr oo- ooa oof oog oom oon ooo oor or- ora orf org orm orn oro orr ra- raa raf rag ram ran rao rar rfa rff rfg rfm rfn rfo rfr rga rgf rgg rgn rgo rgr rma rmf rmg rmm rmn rmo rmr rna rng rnm rnn rno rnr roa rof rog rom ron roo ror rra rrf rrg rrm rrn rrr