a-a a-b aaa aab aak aar aau aay ab- aba abb abk abr abu aby aka akb akk akr aku ar- ara arb ark arr aru ary au- aua aub auk aur ay- aya ayk ayr ayu b-u baa bab bak bar bau bay bba bbb bbk bbr bbu bby bka bkb bkk bkr bra brb brk brr bru bry bua bub buk bur buu buy by- bya byk byr byu ka- kaa kab kak kar kau kay kba kbb kbk kbr kbu kkb kkk kkr kku kky kra krk krr kru kry kub kuk kur kuu kuy kya kyr kyu ra- raa rab rak rar rau ray rba rbb rbk rbr rbu rkb rkk rku rky rra rrb rrk rrr rru rua rub ruk rur ruu ruy ry- rya ryk ryr ryu ryy ua- uaa uab uak uar uau uay uba ubb ubk ubr ubu uby uka ukb ukk ukr uku ur- ura urb urk urr uru ury uua uur uuu uyu yaa yab yak yar yau yay ybr yby yka ykk yra yru yua yuk yur yuu yuy yyb yyu yyy