a-a a-b a-i a-z aaa aab aag aai aar aaz ab- aba abb abg abi abr abz ag- aga agb agg agi agr agz ai- aia aib aig aii air aiz ar- ara arb arg ari arr arz az- aza azb azg azi azz baa bab bag bai bar baz bba bbb bbg bbi bbr bga bgb bgg bgi bgr bgz bi- bia bib big bii bir biz bra brb brg bri brr brz bza bzr bzz gaa gab gag gai gar gaz gba gbg gbi gbr gbz gga ggb ggg ggi ggr ggz gia gib gig gii gir giz gra grb grg gri grr gza gzr ia- iaa iab iag iai iar iaz iba ibb ibg ibi ibr ibz iga igb igg igi igr iia iib iii iir ir- ira irb irg iri irr iza izi izz ra- raa rab rag rai rar raz rba rbb rbg rbi rbr rga rgb rgg rgi rgr ria rib rig rii rir riz rra rrb rrg rri rrr rza rzb z-g zaa zab zag zai zar zaz zbb zbr zgb zgg zgi zia zib zig zir ziz zzr zzz