a-a a-b a-i a-t aaa aab aai aan aao aat aau ab- aba abb abi abn abo abt abu ai- aia aib aii ain aio ait aiu an- ana anb ani ann ano ant anu aoa aob aoi aon aoo aot aou at- ata atb ati atn ato att atu au- aua aub aui aun auo aut b-u baa bab bai ban bao bat bau bba bbb bbi bbn bbo bbt bbu bi- bia bib bii bin bio bit biu bna bnb bni bnn bno bnt bnu boa bob boi bon boo bot bou bta btb bti btn bto btt btu bua bub bui bun buo but buu ia- iaa iab iai ian iao iat iau iba ibb ibi ibn ibo ibt ibu iia iib iii iin iio iit iiu in- ina inb ini inn ino int inu io- ioa iob ioi ion ioo iot iou ita itb iti itn ito itt itu iu- iua iub iui iut n-i naa nab nai nan nao nat nau nba nbb nbi nbn nbo nbt nbu nia nib nii nin nio nit niu nna nnb nni nnn nno nnt nnu no- noa nob noi non noo not nou nta ntb nti ntn nto ntt ntu nua nub nui nun nuo nut nuu o-i oaa oab oai oan oao oat oau ob- oba obb obi obn obo obt obu oia oib oii oin oio oit oiu on- ona onb oni onn ono ont onu oo- ooa oob ooi oon ooo oot ot- ota otb oti otn oto ott otu ou- oua oui oun ouo out taa tab tai tan tao tat tau tba tbb tbi tbn tbo tbt tbu tia tib tii tin tio tit tiu tna tnb tni tnn tno tnt to- toa tob toi ton too tot tou tta ttb tti ttn tto ttt ttu tua tub tui tun tuo tut tuu ua- uaa uab uai uan uao uat uau uba ubb ubi ubn ubo ubt ubu uia uib uii uin uio uit uiu un- una unb uni unn uno unt unu uoa uob uon uoo uot uta utb uti utn uto utt utu uua uun uut uuu