a-a a-b aaa aab aan aar aau aay ab- aba abb abn abr abu aby an- ana anb ann anr anu any ar- ara arb arn arr aru ary au- aua aub aun aur ay- aya ayn ayr ayu b-u baa bab ban bar bau bay bba bbb bbn bbr bbu bby bna bnb bnn bnr bnu bra brb brn brr bru bry bua bub bun bur buu buy by- bya byn byr byu naa nab nan nar nau nay nba nbb nbn nbr nbu nna nnb nnn nnu nra nrb nrn nrr nru nry nua nub nun nur nuu nuy nya nyn nyu nyy ra- raa rab ran rar rau ray rba rbb rbn rbr rbu rna rnb rnn rnr rnu rny rra rrb rrn rrr rru rua rub run rur ruu ruy ry- rya ryn ryr ryu ryy ua- uaa uab uan uar uau uay uba ubb ubn ubr ubu uby un- una unb unn unr unu uny ur- ura urb urn urr uru ury uua uun uur uuu uyu yaa yab yan yar yau yay ybr yby yna ynn ynu yny yra yrn yru yua yun yur yuu yuy yyb yyu yyy