a-a a-b a-i a-t aaa aab aai aan aar aat aau ab- aba abb abi abn abr abt abu ai- aia aib aii ain air ait aiu an- ana anb ani ann anr ant anu ar- ara arb ari arn arr art aru at- ata atb ati atn atr att atu au- aua aub aui aun aur aut b-u baa bab bai ban bar bat bau bba bbb bbi bbn bbr bbt bbu bi- bia bib bii bin bir bit biu bna bnb bni bnn bnr bnt bnu bra brb bri brn brr brt bru bta btb bti btn btr btt btu bua bub bui bun bur but buu ia- iaa iab iai ian iar iat iau iba ibb ibi ibn ibr ibt ibu iia iib iii iin iir iit iiu in- ina inb ini inn inr int inu ir- ira irb iri irn irr irt iru ita itb iti itn itt itu iu- iua iub iui iur iut n-i naa nab nai nan nar nat nau nba nbb nbi nbn nbr nbt nbu nia nib nii nin nir nit niu nna nnb nni nnn nnt nnu nra nrb nri nrn nrr nrt nru nta ntb nti ntn ntr ntt ntu nua nub nui nun nur nut nuu ra- raa rab rai ran rar rat rau rba rbb rbi rbn rbr rbt rbu ria rib rii rin rir rit rna rnb rni rnn rnr rnt rnu rra rrb rri rrn rrr rrt rru rta rtb rti rtn rtr rtt rtu rua rub rui run rur rut ruu taa tab tai tan tar tat tau tba tbb tbi tbn tbr tbt tbu tia tib tii tin tir tit tiu tna tnb tni tnn tnr tnt tra trb tri trn trr trt tru tta ttb tti ttn ttr ttt ttu tua tub tui tun tur tut tuu ua- uaa uab uai uan uar uat uau uba ubb ubi ubn ubr ubt ubu uia uib uii uin uir uit uiu un- una unb uni unn unr unt unu ur- ura urb uri urn urr urt uru uta utb uti utn utr utt utu uua uun uur uut uuu