a-a a-b aaa aab aag aan aar aau aay ab- aba abb abg abn abr abu aby ag- aga agb agg agn agr agu agy an- ana anb ang ann anr anu any ar- ara arb arg arn arr aru ary au- aua aub aug aun aur ay- aya ayn ayr ayu b-u baa bab bag ban bar bau bay bba bbb bbg bbn bbr bbu bby bga bgb bgg bgn bgr bgu bna bnb bng bnn bnr bnu bra brb brg brn brr bru bry bua bub bug bun bur buu buy by- bya byg byn byr byu gaa gab gag gan gar gau gay gba gbg gbn gbr gbu gby gga ggb ggg ggn ggr ggu gna gnb gnn gnr gnu gra grb grg grn grr gru gry gu- gua gub gug gun gur guu guy gy- gya gyb gyn gyr naa nab nag nan nar nau nay nba nbb nbg nbn nbr nbu nga ngb ngg ngn ngu nna nnb nng nnn nnu nra nrb nrg nrn nrr nru nry nua nub nug nun nur nuu nuy nya nyg nyn nyu nyy ra- raa rab rag ran rar rau ray rba rbb rbg rbn rbr rbu rga rgb rgg rgn rgr rna rnb rng rnn rnr rnu rny rra rrb rrg rrn rrr rru rua rub rug run rur ruu ruy ry- rya ryg ryn ryr ryu ryy ua- uaa uab uag uan uar uau uay uba ubb ubg ubn ubr ubu uby uga ugb ugg ugn ugr ugu un- una unb ung unn unr unu uny ur- ura urb urg urn urr uru ury uua uug uun uur uuu uyu yaa yab yag yan yar yau yay ybg ybr yby yga yna yng ynn ynu yny yra yrg yrn yru yua yug yun yur yuu yuy yyb yyg yyu yyy