a-a a-b a-t aaa aab aaf aan aao aat aau aay ab- aba abb abf abn abo abt abu aby af- afa afb aff afn afo aft afu afy an- ana anb anf ann ano ant anu any aoa aob aof aon aoo aot aou at- ata atb atf atn ato att atu au- aua aub auf aun auo aut ay- aya ayf ayn ayo ayt ayu b-u baa bab baf ban bao bat bau bay bba bbb bbf bbn bbo bbt bbu bby bfa bfb bff bfn bfo bft bfu bfy bna bnb bnf bnn bno bnt bnu boa bob bof bon boo bot bou boy bta btb btf btn bto btt btu bty bua bub buf bun buo but buu buy by- bya byf byn byo byt byu faa fab faf fan fao fat fau fay fba fbb fbf fbn fbo fbt fbu ffa fff ffn ffo fft ffu ffy fna fnb fnf fnn fnt fnu foa fob fof fon foo fot fou foy fta ftb ftf ftn fto ftt ftu fty fua fub fuf fun fuo fut fuu fy- fya fyb fyn fyo naa nab naf nan nao nat nau nay nba nbb nbf nbn nbo nbt nbu nfa nfb nff nfn nfo nft nfu nna nnb nnf nnn nno nnt nnu no- noa nob nof non noo not nou noy nta ntb ntf ntn nto ntt ntu nua nub nun nuo nut nuu nuy nya nyf nyn nyo nyt nyu nyy oaa oab oaf oan oao oat oau ob- oba obb obf obn obo obt obu oby of- ofa ofb off ofn ofo oft ofu on- ona onb onf onn ono ont onu ony oo- ooa oob oof oon ooo oot ot- ota otb otf otn oto ott otu ou- oua ouf oun ouo out oya oyo taa tab taf tan tao tat tau tay tba tbb tbf tbn tbo tbt tbu tfa tfb tff tfn tfo tft tfu tna tnb tnf tnn tno tnt to- toa tob tof ton too tot tou toy tta ttb ttf ttn tto ttt ttu tty tua tub tuf tun tuo tut tuu tuy tya tyf tyn tyo tyt ua- uaa uab uaf uan uao uat uau uay uba ubb ubf ubn ubo ubt ubu uby ufa uff ufn ufo uft ufu un- una unb unf unn uno unt unu uny uoa uob uon uoo uot uta utb utf utn uto utt utu uty uua uun uut uuu uyo uyu yaa yab yaf yan yao yat yau yay ybf yby yfa yff yft yfu yna ynn ynu yny yob yof yon yoo yot you yoy yta ytf ytn yto ytt ytu yua yun yuo yut yuu yuy yyb yyf yyt yyu yyy