a-a aaa aaf aag aak aan aao af- afa aff afg afk afn afo ag- aga agf agg agk agn ago aka akg akk akn ako an- ana anf ang ank ann ano aoa aof aog aok aon aoo faa faf fag fak fan fao ffa fff ffg ffk ffn ffo fga fgf fgg fgn fka fkf fkg fkk fna fnf fng fnk fnn foa fof fog fok fon foo gaa gaf gag gak gan gao gfa gff gfk gfo gga ggg ggn ggo gka gkn gko gna gnf gnn gno goa gof gog gok gon goo ka- kaa kaf kag kak kan kao kfa kff kfg kfo kga kgf kgo kkk kkn kn- kna knf kng knk knn kno koa kof kog kok kon koo naa naf nag nak nan nao nfa nff nfk nfn nfo nga ngf ngg ngk ngn ngo nka nkf nkk nkn nko nna nnf nng nnk nnn nno no- noa nof nog nok non noo oaa oaf oag oak oan oao of- ofa off ofg ofn ofo oga ogf ogg ogn ogo oka okg okk oko on- ona onf ong onk onn ono oo- ooa oof oog ook oon ooo