a-a a-b a-i a-t aaa aab aag aai aan aao aat aau ab- aba abb abg abi abn abo abt abu ag- aga agb agg agi agn ago agt agu ai- aia aib aig aii ain aio ait aiu an- ana anb ang ani ann ano ant anu aoa aob aog aoi aon aoo aot aou at- ata atb atg ati atn ato att atu au- aua aub aug aui aun auo aut b-u baa bab bag bai ban bao bat bau bba bbb bbg bbi bbn bbo bbt bbu bga bgb bgg bgi bgn bgo bgt bgu bi- bia bib big bii bin bio bit biu bna bnb bng bni bnn bno bnt bnu boa bob bog boi bon boo bot bou bta btb btg bti btn bto btt btu bua bub bug bui bun buo but buu gaa gab gag gai gan gao gat gau gba gbg gbi gbn gbo gbt gbu gga ggb ggg ggi ggn ggo ggt ggu gia gib gig gii gin gio git giu gna gnb gni gnn gno gnt gnu goa gob gog goi gon goo got gou gta gtb gtg gti gtn gto gtt gtu gu- gua gub gug gui gun guo gut guu ia- iaa iab iag iai ian iao iat iau iba ibb ibg ibi ibn ibo ibt ibu iga igb igg igi ign igo igt igu iia iib iii iin iio iit iiu in- ina inb ing ini inn ino int inu io- ioa iob iog ioi ion ioo iot iou ita itb itg iti itn ito itt itu iu- iua iub iug iui iut n-i naa nab nag nai nan nao nat nau nba nbb nbg nbi nbn nbo nbt nbu nga ngb ngg ngi ngn ngo ngt ngu nia nib nig nii nin nio nit niu nna nnb nng nni nnn nno nnt nnu no- noa nob nog noi non noo not nou nta ntb ntg nti ntn nto ntt ntu nua nub nug nui nun nuo nut nuu o-i oaa oab oag oai oan oao oat oau ob- oba obb obg obi obn obo obt obu oga ogg ogi ogn ogo ogt oia oib oii oin oio oit oiu on- ona onb ong oni onn ono ont onu oo- ooa oob oog ooi oon ooo oot ot- ota otb otg oti otn oto ott otu ou- oua oui oun ouo out taa tab tag tai tan tao tat tau tba tbb tbg tbi tbn tbo tbt tbu tga tgb tgg tgi tgn tgo tgt tgu tia tib tig tii tin tio tit tiu tna tnb tng tni tnn tno tnt to- toa tob tog toi ton too tot tou tta ttb ttg tti ttn tto ttt ttu tua tub tug tui tun tuo tut tuu ua- uaa uab uag uai uan uao uat uau uba ubb ubg ubi ubn ubo ubt ubu uga ugb ugg ugi ugn ugo ugt ugu uia uib uig uii uin uio uit uiu un- una unb ung uni unn uno unt unu uoa uob uog uon uoo uot uta utb uti utn uto utt utu uua uug uun uut uuu