a-a a-b a-i aaa aab aai aak aam aan aao ab- aba abb abi abk abm abn abo ai- aia aib aii aik aim ain aio aka akb aki akk akm akn ako ama amb ami amk amm amn amo an- ana anb ani ank anm ann ano aoa aob aoi aok aom aon aoo baa bab bai bak bam ban bao bba bbb bbi bbk bbm bbn bbo bi- bia bib bii bik bim bin bio bka bkb bkk bkm bkn bko bma bmb bmi bmk bmm bmn bmo bna bnb bni bnk bnn bno boa bob boi bok bom bon boo ia- iaa iab iai iam ian iao iba ibb ibi ibk ibm ibn ibo iia iib iii iim iin iio ika ikb iki ikk iko im- ima imb imi imm imn imo in- ina inb ini ink inm inn ino io- ioa iob ioi iom ion ioo ka- kaa kab kai kak kam kan kao kba kbb kbi kbk kbm kbn kbo kia kib kii kik kim kin kio kkb kki kkk kkm kkn kma kmb kmi kmk kmm kmo kn- kna kni knk knm knn kno koa kob koi kok kom kon koo m-o maa mab mai mak mam man mao mba mbb mbi mbk mbm mbo mi- mia mib mii mik mim min mio mka mkb mkk mkm mkn mko mma mmb mmi mmk mmm mmn mmo mna mnb mni mnk mnm mnn mno moa mob moi mok mom mon moo n-i naa nab nai nak nam nan nao nba nbb nbi nbk nbm nbn nbo nia nib nii nik nim nin nio nka nki nkk nkm nkn nko nma nmb nmi nmk nmm nmn nmo nna nnb nni nnk nnm nnn nno no- noa nob noi nok nom non noo o-i oaa oab oai oak oam oan oao ob- oba obb obi obk obm obn obo oia oib oii oik oim oin oio oka okb oki okk oko om- oma omb omi omm omn omo on- ona onb oni onk onn ono oo- ooa oob ooi ook oom oon ooo