a-a a-b a-i aaa aab aag aai aak aan aao ab- aba abb abg abi abk abn abo ag- aga agb agg agi agk agn ago ai- aia aib aig aii aik ain aio aka akb akg aki akk akn ako an- ana anb ang ani ank ann ano aoa aob aog aoi aok aon aoo baa bab bag bai bak ban bao bba bbb bbg bbi bbk bbn bbo bga bgb bgg bgi bgk bgn bgo bi- bia bib big bii bik bin bio bka bkb bkg bkk bkn bko bna bnb bng bni bnk bnn bno boa bob bog boi bok bon boo gaa gab gag gai gak gan gao gba gbg gbi gbk gbn gbo gga ggb ggg ggi ggn ggo gia gib gig gii gik gin gio gka gkb gkn gko gna gnb gni gnn gno goa gob gog goi gok gon goo ia- iaa iab iag iai ian iao iba ibb ibg ibi ibk ibn ibo iga igb igg igi igk ign igo iia iib iii iin iio ika ikb iki ikk iko in- ina inb ing ini ink inn ino io- ioa iob iog ioi ion ioo ka- kaa kab kag kai kak kan kao kba kbb kbi kbk kbn kbo kga kgb kgi kgo kia kib kig kii kik kin kio kkb kki kkk kkn kn- kna kng kni knk knn kno koa kob kog koi kok kon koo n-i naa nab nag nai nak nan nao nba nbb nbg nbi nbk nbn nbo nga ngb ngg ngi ngk ngn ngo nia nib nig nii nik nin nio nka nki nkk nkn nko nna nnb nng nni nnk nnn nno no- noa nob nog noi nok non noo o-i oaa oab oag oai oak oan oao ob- oba obb obg obi obk obn obo oga ogg ogi ogn ogo oia oib oii oik oin oio oka okb okg oki okk oko on- ona onb ong oni onk onn ono oo- ooa oob oog ooi ook oon ooo