a-a a-b a-t aaa aab aan aao aat aau aay ab- aba abb abn abo abt abu aby an- ana anb ann ano ant anu any aoa aob aon aoo aot aou at- ata atb atn ato att atu au- aua aub aun auo aut ay- aya ayn ayo ayt ayu b-u baa bab ban bao bat bau bay bba bbb bbn bbo bbt bbu bby bna bnb bnn bno bnt bnu boa bob bon boo bot bou boy bta btb btn bto btt btu bty bua bub bun buo but buu buy by- bya byn byo byt byu naa nab nan nao nat nau nay nba nbb nbn nbo nbt nbu nna nnb nnn nno nnt nnu no- noa nob non noo not nou noy nta ntb ntn nto ntt ntu nua nub nun nuo nut nuu nuy nya nyn nyo nyt nyu nyy oaa oab oan oao oat oau ob- oba obb obn obo obt obu oby on- ona onb onn ono ont onu ony oo- ooa oob oon ooo oot ot- ota otb otn oto ott otu ou- oua oun ouo out oya oyo taa tab tan tao tat tau tay tba tbb tbn tbo tbt tbu tna tnb tnn tno tnt to- toa tob ton too tot tou toy tta ttb ttn tto ttt ttu tty tua tub tun tuo tut tuu tuy tya tyn tyo tyt ua- uaa uab uan uao uat uau uay uba ubb ubn ubo ubt ubu uby un- una unb unn uno unt unu uny uoa uob uon uoo uot uta utb utn uto utt utu uty uua uun uut uuu uyo uyu yaa yab yan yao yat yau yay yby yna ynn ynu yny yob yon yoo yot you yoy yta ytn yto ytt ytu yua yun yuo yut yuu yuy yyb yyt yyu yyy