a-a a-b aaa aab aak aan aar aau aay ab- aba abb abk abn abr abu aby aka akb akk akn akr aku an- ana anb ank ann anr anu any ar- ara arb ark arn arr aru ary au- aua aub auk aun aur ay- aya ayk ayn ayr ayu b-u baa bab bak ban bar bau bay bba bbb bbk bbn bbr bbu bby bka bkb bkk bkn bkr bna bnb bnk bnn bnr bnu bra brb brk brn brr bru bry bua bub buk bun bur buu buy by- bya byk byn byr byu ka- kaa kab kak kan kar kau kay kba kbb kbk kbn kbr kbu kkb kkk kkn kkr kku kky kn- kna knk knn knr knu kra krk krn krr kru kry kub kuk kun kur kuu kuy kya kyn kyr kyu naa nab nak nan nar nau nay nba nbb nbk nbn nbr nbu nka nkk nkn nkr nku nky nna nnb nnk nnn nnu nra nrb nrk nrn nrr nru nry nua nub nuk nun nur nuu nuy nya nyk nyn nyu nyy ra- raa rab rak ran rar rau ray rba rbb rbk rbn rbr rbu rkb rkk rku rky rna rnb rnn rnr rnu rny rra rrb rrk rrn rrr rru rua rub ruk run rur ruu ruy ry- rya ryk ryn ryr ryu ryy ua- uaa uab uak uan uar uau uay uba ubb ubk ubn ubr ubu uby uka ukb ukk ukn ukr uku un- una unb unk unn unr unu uny ur- ura urb urk urn urr uru ury uua uun uur uuu uyu yaa yab yak yan yar yau yay ybr yby yka ykk ykn yna ynk ynn ynu yny yra yrn yru yua yuk yun yur yuu yuy yyb yyu yyy