a-a aaa aad aaf aam aan aao ad- ada add adf adm adn ado af- afa afd aff afm afn afo ama amd amf amm amn amo an- ana and anf anm ann ano aoa aod aof aom aon aoo daa dad daf dam dan dao dda ddd ddf ddm ddn ddo dfa dfd dff dfm dfn dfo dma dmd dmf dmm dmn dmo dna dnd dnf dnm dnn dno doa dod dof dom don doo faa fad faf fam fan fao fda fdd fdf fdm fdn fdo ffa ffd fff ffm ffn ffo fma fmd fmf fmm fmn fmo fna fnd fnf fnm fnn foa fof fom fon foo m-f m-o maa mad maf mam man mao mda mdd mdf mdm mdn mdo mfa mfd mff mfm mfn mfo mma mmd mmf mmm mmn mmo mna mnf mnm mnn mno moa mod mof mom mon moo naa nad naf nam nan nao nda ndd ndf ndm ndn ndo nfa nfd nff nfn nfo nma nmd nmm nmn nmo nna nnf nnm nnn nno no- noa nod nof nom non noo oaa oad oaf oam oan oao oda odd odf odm odn odo of- ofa ofd off ofm ofn ofo om- oma omd omf omm omn omo on- ona ond onf onn ono oo- ooa ood oof oom oon ooo