a-a a-t a-z aaa aaf aag aan aao aat aaz af- afa aff afg afn afo aft afz ag- aga agf agg agn ago agt agz an- ana anf ang ann ano ant anz aoa aof aog aon aoo aot at- ata atf atg atn ato att atz az- aza azf azg azn azo azt azz faa faf fag fan fao fat faz ffa fff ffg ffn ffo fft ffz fga fgf fgg fgn fgt fgz fna fnf fng fnn fnt fnz foa fof fog fon foo fot foz fta ftf ftg ftn fto ftt ftz gaa gaf gag gan gao gat gaz gfa gff gfo gft gfz gga ggg ggn ggo ggt ggz gna gnf gnn gno gnt goa gof gog gon goo got goz gta gtf gtg gtn gto gtt gza gzo naa naf nag nan nao nat naz nfa nff nfn nfo nft nga ngf ngg ngn ngo ngt nna nnf nng nnn nno nnt nnz no- noa nof nog non noo not noz nta ntf ntg ntn nto ntt ntz nzf nzg nzo nzz oaa oaf oag oan oao oat of- ofa off ofg ofn ofo oft ofz oga ogf ogg ogn ogo ogt on- ona onf ong onn ono ont oo- ooa oof oog oon ooo oot ot- ota otf otg otn oto ott otz oza ozo ozt ozz taa taf tag tan tao tat taz tfa tff tfg tfn tfo tft tga tgf tgg tgn tgo tgt tgz tna tnf tng tnn tno tnt tnz to- toa tof tog ton too tot toz tta ttf ttg ttn tto ttt tza tzf z-g zaa zaf zag zan zao zat zaz zfa zfn zgg znn zno zo- zoa zof zog zon zoo zot zta zzt zzz