a-a a-b a-i aaa aab aai aan aao aau ab- aba abb abi abn abo abu ai- aia aib aii ain aio aiu an- ana anb ani ann ano anu aoa aob aoi aon aoo aou au- aua aub aui aun auo b-u baa bab bai ban bao bau bba bbb bbi bbn bbo bbu bi- bia bib bii bin bio biu bna bnb bni bnn bno bnu boa bob boi bon boo bou bua bub bui bun buo buu ia- iaa iab iai ian iao iau iba ibb ibi ibn ibo ibu iia iib iii iin iio iiu in- ina inb ini inn ino inu io- ioa iob ioi ion ioo iou iu- iua iub iui n-i naa nab nai nan nao nau nba nbb nbi nbn nbo nbu nia nib nii nin nio niu nna nnb nni nnn nno nnu no- noa nob noi non noo nou nua nub nui nun nuo nuu o-i oaa oab oai oan oao oau ob- oba obb obi obn obo obu oia oib oii oin oio oiu on- ona onb oni onn ono onu oo- ooa oob ooi oon ooo ou- oua oui oun ouo ua- uaa uab uai uan uao uau uba ubb ubi ubn ubo ubu uia uib uii uin uio uiu un- una unb uni unn uno unu uoa uob uon uoo uua uun uuu