a-a a-b a-i a-z aaa aab aag aai aan aar aaz ab- aba abb abg abi abn abr abz ag- aga agb agg agi agn agr agz ai- aia aib aig aii ain air aiz an- ana anb ang ani ann anr anz ar- ara arb arg ari arn arr arz az- aza azb azg azi azn azz baa bab bag bai ban bar baz bba bbb bbg bbi bbn bbr bga bgb bgg bgi bgn bgr bgz bi- bia bib big bii bin bir biz bna bnb bng bni bnn bnr bnz bra brb brg bri brn brr brz bza bzn bzr bzz gaa gab gag gai gan gar gaz gba gbg gbi gbn gbr gbz gga ggb ggg ggi ggn ggr ggz gia gib gig gii gin gir giz gna gnb gni gnn gnr gra grb grg gri grn grr gza gzr ia- iaa iab iag iai ian iar iaz iba ibb ibg ibi ibn ibr ibz iga igb igg igi ign igr iia iib iii iin iir in- ina inb ing ini inn inr ir- ira irb irg iri irn irr iza izi izz n-i naa nab nag nai nan nar naz nba nbb nbg nbi nbn nbr nga ngb ngg ngi ngn nia nib nig nii nin nir niz nna nnb nng nni nnn nnz nra nrb nrg nri nrn nrr nrz nzb nzg nzi nzz ra- raa rab rag rai ran rar raz rba rbb rbg rbi rbn rbr rga rgb rgg rgi rgn rgr ria rib rig rii rin rir riz rna rnb rng rni rnn rnr rnz rra rrb rrg rri rrn rrr rza rzb z-g zaa zab zag zai zan zar zaz zbb zbr zgb zgg zgi zia zib zig zin zir ziz znn zzr zzz