a-a a-b aaa aab aak aan aar aav aay ab- aba abb abk abn abr abv aby aka akb akk akn akr akv an- ana anb ank ann anr anv any ar- ara arb ark arn arr arv ary av- ava avb avk avn avr avy ay- aya ayk ayn ayr baa bab bak ban bar bav bay bba bbb bbk bbn bbr bby bka bkb bkk bkn bkr bkv bna bnb bnk bnn bnr bnv bra brb brk brn brr brv bry bva bvb bvk bvn bvr bvv by- bya byk byn byr ka- kaa kab kak kan kar kav kay kba kbb kbk kbn kbr kkb kkk kkn kkr kkv kky kn- kna knk knn knr kra krk krn krr krv kry kva kvb kvk kvn kvr kvv kya kyn kyr naa nab nak nan nar nav nay nba nbb nbk nbn nbr nbv nka nkk nkn nkr nky nna nnb nnk nnn nnv nra nrb nrk nrn nrr nrv nry nva nvb nvk nvn nvv nya nyk nyn nyy ra- raa rab rak ran rar rav ray rba rbb rbk rbn rbr rkb rkk rkv rky rna rnb rnn rnr rnv rny rra rrb rrk rrn rrr rva rvb rvn rvr rvv rvy ry- rya ryk ryn ryr ryy v-a vaa vab vak van var vav vay vba vbk vbr vbv vka vkb vn- vna vnr vnv vra vrb vrk vrn vrr vry vva vvb vvr vvv vyn yaa yab yak yan yar yav yay ybr yby yka ykk ykn yna ynk ynn yny yra yrn yva yvr yvy yyb yyy