a-a aaa aaf aak aam aan aao af- afa aff afk afm afn afo aka akk akm akn ako ama amf amk amm amn amo an- ana anf ank anm ann ano aoa aof aok aom aon aoo faa faf fak fam fan fao ffa fff ffk ffm ffn ffo fka fkf fkk fkm fma fmf fmm fmn fmo fna fnf fnk fnm fnn foa fof fok fom fon foo ka- kaa kaf kak kam kan kao kfa kff kfm kfo kkk kkm kkn kma kmf kmk kmm kmo kn- kna knf knk knm knn kno koa kof kok kom kon koo m-f m-o maa maf mak mam man mao mfa mff mfm mfn mfo mka mkk mkm mkn mko mma mmf mmk mmm mmn mmo mna mnf mnk mnm mnn mno moa mof mok mom mon moo naa naf nak nam nan nao nfa nff nfk nfn nfo nka nkf nkk nkm nkn nko nma nmk nmm nmn nmo nna nnf nnk nnm nnn nno no- noa nof nok nom non noo oaa oaf oak oam oan oao of- ofa off ofm ofn ofo oka okk oko om- oma omf omm omn omo on- ona onf onk onn ono oo- ooa oof ook oom oon ooo