b-u bbb bbf bbn bbo bbt bbu bby bfb bff bfn bfo bft bfu bfy bnb bnf bnn bno bnt bnu bob bof bon boo bot bou boy btb btf btn bto btt btu bty bub buf bun buo but buu buy by- byf byn byo byt byu fbb fbf fbn fbo fbt fbu fff ffn ffo fft ffu ffy fnb fnf fnn fnt fnu fob fof fon foo fot fou foy ftb ftf ftn fto ftt ftu fty fub fuf fun fuo fut fuu fy- fyb fyn fyo nbb nbf nbn nbo nbt nbu nfb nff nfn nfo nft nfu nnb nnf nnn nno nnt nnu no- nob nof non noo not nou noy ntb ntf ntn nto ntt ntu nub nun nuo nut nuu nuy nyf nyn nyo nyt nyu nyy ob- obb obf obn obo obt obu oby of- ofb off ofn ofo oft ofu on- onb onf onn ono ont onu ony oo- oob oof oon ooo oot ot- otb otf otn oto ott otu ou- ouf oun ouo out oyo tbb tbf tbn tbo tbt tbu tfb tff tfn tfo tft tfu tnb tnf tnn tno tnt to- tob tof ton too tot tou toy ttb ttf ttn tto ttt ttu tty tub tuf tun tuo tut tuu tuy tyf tyn tyo tyt ubb ubf ubn ubo ubt ubu uby uff ufn ufo uft ufu un- unb unf unn uno unt unu uny uob uon uoo uot utb utf utn uto utt utu uty uun uut uuu uyo uyu ybf yby yff yft yfu ynn ynu yny yob yof yon yoo yot you yoy ytf ytn yto ytt ytu yun yuo yut yuu yuy yyb yyf yyt yyu yyy