a-a a-b aaa aab aak aan aar aay ab- aba abb abk abn abr aby aka akb akk akn akr an- ana anb ank ann anr any ar- ara arb ark arn arr ary ay- aya ayk ayn ayr baa bab bak ban bar bay bba bbb bbk bbn bbr bby bka bkb bkk bkn bkr bna bnb bnk bnn bnr bra brb brk brn brr bry by- bya byk byn byr ka- kaa kab kak kan kar kay kba kbb kbk kbn kbr kkb kkk kkn kkr kky kn- kna knk knn knr kra krk krn krr kry kya kyn kyr naa nab nak nan nar nay nba nbb nbk nbn nbr nka nkk nkn nkr nky nna nnb nnk nnn nra nrb nrk nrn nrr nry nya nyk nyn nyy ra- raa rab rak ran rar ray rba rbb rbk rbn rbr rkb rkk rky rna rnb rnn rnr rny rra rrb rrk rrn rrr ry- rya ryk ryn ryr ryy yaa yab yak yan yar yay ybr yby yka ykk ykn yna ynk ynn yny yra yrn yyb yyy