a-a a-b aaa aab aag aah aao aau aay ab- aba abb abg abh abo abu aby ag- aga agb agg agh ago agu agy aha ahb ahg ahh aho ahu ahy aoa aob aog aoh aoo aou au- aua aub aug auh auo ay- aya ayh ayo ayu b-u baa bab bag bah bao bau bay bba bbb bbg bbh bbo bbu bby bga bgb bgg bgh bgo bgu bha bhb bhg bhh bho bhu boa bob bog boh boo bou boy bua bub bug buh buo buu buy by- bya byg byh byo byu gaa gab gag gah gao gau gay gba gbg gbh gbo gbu gby gga ggb ggg ggh ggo ggu gha ghb ghg ghh gho goa gob gog goh goo gou goy gu- gua gub gug guo guu guy gy- gya gyb gyo haa hab hag hah hao hau hay hba hbb hbg hbh hbo hbu hby hga hgb hgg hgh hgo hgu hgy hha hhb hhg hhh hho hhu hhy hoa hob hog hoh hoo hou hoy hua hub hug huh huo huu huy hy- hya hyb hyg hyh hyo hyy oaa oab oag oah oao oau ob- oba obb obg obh obo obu oby oga ogg ogh ogo ogy oha ohg ohh oho ohu oo- ooa oob oog ooh ooo ou- oua ouh ouo oya oyo ua- uaa uab uag uah uao uau uay uba ubb ubg ubh ubo ubu uby uga ugb ugg ugh ugo ugu uha uhb uhh uho uhu uhy uoa uob uog uoo uua uug uuu uyo uyu yaa yab yag yah yao yau yay ybg yby yga ygo yha yhu yob yog yoo you yoy yua yug yuh yuo yuu yuy yyb yyg yyu yyy