a-a a-b a-i aaa aab aag aai aak aan aar ab- aba abb abg abi abk abn abr ag- aga agb agg agi agk agn agr ai- aia aib aig aii aik ain air aka akb akg aki akk akn akr an- ana anb ang ani ank ann anr ar- ara arb arg ari ark arn arr baa bab bag bai bak ban bar bba bbb bbg bbi bbk bbn bbr bga bgb bgg bgi bgk bgn bgr bi- bia bib big bii bik bin bir bka bkb bkg bkk bkn bkr bna bnb bng bni bnk bnn bnr bra brb brg bri brk brn brr gaa gab gag gai gak gan gar gba gbg gbi gbk gbn gbr gga ggb ggg ggi ggn ggr gia gib gig gii gik gin gir gka gkb gkn gna gnb gni gnn gnr gra grb grg gri grk grn grr ia- iaa iab iag iai ian iar iba ibb ibg ibi ibk ibn ibr iga igb igg igi igk ign igr iia iib iii iin iir ika ikb iki ikk ikr in- ina inb ing ini ink inn inr ir- ira irb irg iri irk irn irr ka- kaa kab kag kai kak kan kar kba kbb kbi kbk kbn kbr kga kgb kgi kia kib kig kii kik kin kir kkb kki kkk kkn kkr kn- kna kng kni knk knn knr kra krg kri krk krn krr n-i naa nab nag nai nak nan nar nba nbb nbg nbi nbk nbn nbr nga ngb ngg ngi ngk ngn nia nib nig nii nik nin nir nka nki nkk nkn nkr nna nnb nng nni nnk nnn nra nrb nrg nri nrk nrn nrr ra- raa rab rag rai rak ran rar rba rbb rbg rbi rbk rbn rbr rga rgb rgg rgi rgk rgn rgr ria rib rig rii rik rin rir rkb rkg rkk rna rnb rng rni rnn rnr rra rrb rrg rri rrk rrn rrr