a-a a-b a-i aaa aab aag aai aak aan aar aax aay ab- aba abb abg abi abk abn abr abx aby ag- aga agb agg agi agk agn agr agx agy ai- aia aib aig aii aik ain air aix aiy aka akb akg aki akk akn akr an- ana anb ang ani ank ann anr anx any ar- ara arb arg ari ark arn arr arx ary ax- axa axi axk axn axr axx ay- aya ayi ayk ayn ayr ayx baa bab bag bai bak ban bar bax bay bba bbb bbg bbi bbk bbn bbr bbx bby bga bgb bgg bgi bgk bgn bgr bgx bi- bia bib big bii bik bin bir bix biy bka bkb bkg bkk bkn bkr bkx bna bnb bng bni bnk bnn bnr bnx bra brb brg bri brk brn brr brx bry bxb bxi bxn bxx by- bya byg byi byk byn byr gaa gab gag gai gak gan gar gay gba gbg gbi gbk gbn gbr gbx gby gga ggb ggg ggi ggn ggr gia gib gig gii gik gin gir giy gka gkb gkn gna gnb gni gnn gnr gra grb grg gri grk grn grr grx gry gxa gy- gya gyb gyn gyr ia- iaa iab iag iai ian iar iba ibb ibg ibi ibk ibn ibr ibx iby iga igb igg igi igk ign igr igy iia iib iii iin iir iix ika ikb iki ikk ikr ikx in- ina inb ing ini ink inn inr inx iny ir- ira irb irg iri irk irn irr irx iry ixi ixn ixy iya iyr iyy ka- kaa kab kag kai kak kan kar kax kay kba kbb kbi kbk kbn kbr kbx kga kgb kgi kgx kgy kia kib kig kii kik kin kir kix kkb kki kkk kkn kkr kky kn- kna kng kni knk knn knr knx kra krg kri krk krn krr kry kxy kya kyn kyr kyx n-i naa nab nag nai nak nan nar nax nay nba nbb nbg nbi nbk nbn nbr nbx nga ngb ngg ngi ngk ngn nia nib nig nii nik nin nir nix nka nki nkk nkn nkr nky nna nnb nng nni nnk nnn nra nrb nrg nri nrk nrn nrr nrx nry nya nyg nyk nyn nyx nyy ra- raa rab rag rai rak ran rar rax ray rba rbb rbg rbi rbk rbn rbr rbx rga rgb rgg rgi rgk rgn rgr rgx ria rib rig rii rik rin rir rix riy rkb rkg rkk rky rna rnb rng rni rnn rnr rny rra rrb rrg rri rrk rrn rrr rxr ry- rya ryg ryk ryn ryr ryy xaa xag xak xan xar xbr xbx xgi xia xii xin xix xkb xna xnk xrx xry xxi xxx xxy xyr xyy yaa yab yag yai yak yan yar yax yay ybg ybi ybr yby yga yig yii yin yir yka yki ykk ykn yna yng ynk ynn yny yra yrg yrn yxa yxy yyb yyg yyy