a-a a-b a-i aaa aab aai aak aar aay ab- aba abb abi abk abr aby ai- aia aib aii aik air aiy aka akb aki akk akr ar- ara arb ari ark arr ary ay- aya ayi ayk ayr baa bab bai bak bar bay bba bbb bbi bbk bbr bby bi- bia bib bii bik bir biy bka bkb bkk bkr bra brb bri brk brr bry by- bya byi byk byr ia- iaa iab iai iar iba ibb ibi ibk ibr iby iia iib iii iir ika ikb iki ikk ikr ir- ira irb iri irk irr iry iya iyr iyy ka- kaa kab kai kak kar kay kba kbb kbi kbk kbr kia kib kii kik kir kkb kki kkk kkr kky kra kri krk krr kry kya kyr ra- raa rab rai rak rar ray rba rbb rbi rbk rbr ria rib rii rik rir riy rkb rkk rky rra rrb rri rrk rrr ry- rya ryk ryr ryy yaa yab yai yak yar yay ybi ybr yby yii yir yka yki ykk yra yyb yyy