a-a a-b a-i a-t a-z aaa aab aai aan aar aat aaz ab- aba abb abi abn abr abt abz ai- aia aib aii ain air ait aiz an- ana anb ani ann anr ant anz ar- ara arb ari arn arr art arz at- ata atb ati atn atr att atz az- aza azb azi azn azt azz baa bab bai ban bar bat baz bba bbb bbi bbn bbr bbt bi- bia bib bii bin bir bit biz bna bnb bni bnn bnr bnt bnz bra brb bri brn brr brt brz bta btb bti btn btr btt btz bza bzn bzr bzz ia- iaa iab iai ian iar iat iaz iba ibb ibi ibn ibr ibt ibz iia iib iii iin iir iit in- ina inb ini inn inr int ir- ira irb iri irn irr irt ita itb iti itn itt itz iza izi izz n-i naa nab nai nan nar nat naz nba nbb nbi nbn nbr nbt nia nib nii nin nir nit niz nna nnb nni nnn nnt nnz nra nrb nri nrn nrr nrt nrz nta ntb nti ntn ntr ntt ntz nzb nzi nzz ra- raa rab rai ran rar rat raz rba rbb rbi rbn rbr rbt ria rib rii rin rir rit riz rna rnb rni rnn rnr rnt rnz rra rrb rri rrn rrr rrt rta rtb rti rtn rtr rtt rtz rza rzb taa tab tai tan tar tat taz tba tbb tbi tbn tbr tbt tbz tia tib tii tin tir tit tiz tna tnb tni tnn tnr tnt tnz tra trb tri trn trr trt trz tta ttb tti ttn ttr ttt tza zaa zab zai zan zar zat zaz zbb zbr zbt zia zib zin zir zit ziz znn zta ztr zzr zzt zzz