a-a a-b a-i aaa aab aag aai aao aar aau aay ab- aba abb abg abi abo abr abu aby ag- aga agb agg agi ago agr agu agy ai- aia aib aig aii aio air aiu aiy aoa aob aog aoi aoo aor aou ar- ara arb arg ari aro arr aru ary au- aua aub aug aui auo aur ay- aya ayi ayo ayr ayu b-u baa bab bag bai bao bar bau bay bba bbb bbg bbi bbo bbr bbu bby bga bgb bgg bgi bgo bgr bgu bi- bia bib big bii bio bir biu biy boa bob bog boi boo bor bou boy bra brb brg bri bro brr bru bry bua bub bug bui buo bur buu buy by- bya byg byi byo byr byu gaa gab gag gai gao gar gau gay gba gbg gbi gbo gbr gbu gby gga ggb ggg ggi ggo ggr ggu gia gib gig gii gio gir giu giy goa gob gog goi goo gor gou goy gra grb grg gri gro grr gru gry gu- gua gub gug gui guo gur guu guy gy- gya gyb gyo gyr ia- iaa iab iag iai iao iar iau iba ibb ibg ibi ibo ibr ibu iby iga igb igg igi igo igr igu igy iia iib iii iio iir iiu io- ioa iob iog ioi ioo ior iou ir- ira irb irg iri iro irr iru iry iu- iua iub iug iui iur iya iyo iyr iyy o-i oaa oab oag oai oao oar oau ob- oba obb obg obi obo obr obu oby oga ogg ogi ogo ogy oia oib oii oio oir oiu oo- ooa oob oog ooi ooo oor or- ora orb org ori oro orr oru ory ou- oua oui ouo our oya oyi oyo ra- raa rab rag rai rao rar rau ray rba rbb rbg rbi rbo rbr rbu rga rgb rgg rgi rgo rgr ria rib rig rii rio rir riy roa rob rog roi roo ror rou roy rra rrb rrg rri rrr rru rua rub rug rui ruo rur ruu ruy ry- rya ryg ryo ryr ryu ryy ua- uaa uab uag uai uao uar uau uay uba ubb ubg ubi ubo ubr ubu uby uga ugb ugg ugi ugo ugr ugu uia uib uig uii uio uir uiu uoa uob uog uoo uor ur- ura urb urg uri uro urr uru ury uua uug uur uuu uyi uyo uyu yaa yab yag yai yao yar yau yay ybg ybi ybr yby yga ygo yig yii yio yir yob yog yoi yoo yor you yoy yra yrg yro yru yua yug yui yuo yur yuu yuy yyb yyg yyu yyy