a-a a-b a-i aaa aab aag aai aan aao ab- aba abb abg abi abn abo ag- aga agb agg agi agn ago ai- aia aib aig aii ain aio an- ana anb ang ani ann ano aoa aob aog aoi aon aoo baa bab bag bai ban bao bba bbb bbg bbi bbn bbo bga bgb bgg bgi bgn bgo bi- bia bib big bii bin bio bna bnb bng bni bnn bno boa bob bog boi bon boo gaa gab gag gai gan gao gba gbg gbi gbn gbo gga ggb ggg ggi ggn ggo gia gib gig gii gin gio gna gnb gni gnn gno goa gob gog goi gon goo ia- iaa iab iag iai ian iao iba ibb ibg ibi ibn ibo iga igb igg igi ign igo iia iib iii iin iio in- ina inb ing ini inn ino io- ioa iob iog ioi ion ioo n-i naa nab nag nai nan nao nba nbb nbg nbi nbn nbo nga ngb ngg ngi ngn ngo nia nib nig nii nin nio nna nnb nng nni nnn nno no- noa nob nog noi non noo o-i oaa oab oag oai oan oao ob- oba obb obg obi obn obo oga ogg ogi ogn ogo oia oib oii oin oio on- ona onb ong oni onn ono oo- ooa oob oog ooi oon ooo