a-a a-b a-i aaa aab aai aak aao aar aau aay ab- aba abb abi abk abo abr abu aby ai- aia aib aii aik aio air aiu aiy aka akb aki akk ako akr aku aoa aob aoi aok aoo aor aou ar- ara arb ari ark aro arr aru ary au- aua aub aui auk auo aur ay- aya ayi ayk ayo ayr ayu b-u baa bab bai bak bao bar bau bay bba bbb bbi bbk bbo bbr bbu bby bi- bia bib bii bik bio bir biu biy bka bkb bkk bko bkr boa bob boi bok boo bor bou boy bra brb bri brk bro brr bru bry bua bub bui buk buo bur buu buy by- bya byi byk byo byr byu ia- iaa iab iai iao iar iau iba ibb ibi ibk ibo ibr ibu iby iia iib iii iio iir iiu ika ikb iki ikk iko ikr iku io- ioa iob ioi ioo ior iou ir- ira irb iri irk iro irr iru iry iu- iua iub iui iur iya iyo iyr iyy ka- kaa kab kai kak kao kar kau kay kba kbb kbi kbk kbo kbr kbu kia kib kii kik kio kir kiu kkb kki kkk kkr kku kky koa kob koi kok koo kor kou koy kra kri krk kro krr kru kry kub kui kuk kur kuu kuy kya kyo kyr kyu o-i oaa oab oai oak oao oar oau ob- oba obb obi obk obo obr obu oby oia oib oii oik oio oir oiu oka okb oki okk oko okr oku oo- ooa oob ooi ook ooo oor or- ora orb ori ork oro orr oru ory ou- oua oui ouk ouo our oya oyi oyo ra- raa rab rai rak rao rar rau ray rba rbb rbi rbk rbo rbr rbu ria rib rii rik rio rir riy rkb rkk rko rku rky roa rob roi rok roo ror rou roy rra rrb rri rrk rrr rru rua rub rui ruk ruo rur ruu ruy ry- rya ryk ryo ryr ryu ryy ua- uaa uab uai uak uao uar uau uay uba ubb ubi ubk ubo ubr ubu uby uia uib uii uio uir uiu uka ukb uki ukk ukr uku uoa uob uok uoo uor ur- ura urb uri urk uro urr uru ury uua uur uuu uyi uyo uyu yaa yab yai yak yao yar yau yay ybi ybr yby yii yio yir yka yki ykk yob yoi yok yoo yor you yoy yra yro yru yua yui yuk yuo yur yuu yuy yyb yyu yyy