-th a-a a-b a-t aaa aab aah aan aao aat aay ab- aba abb abh abn abo abt aby aha ahb ahh ahn aho aht ahy an- ana anb anh ann ano ant any aoa aob aoh aon aoo aot at- ata atb ath atn ato att ay- aya ayh ayn ayo ayt baa bab bah ban bao bat bay bba bbb bbh bbn bbo bbt bby bha bhb bhh bho bht bna bnb bnn bno bnt boa bob boh bon boo bot boy bta btb bth btn bto btt bty by- bya byh byn byo byt haa hab hah han hao hat hay hba hbb hbh hbn hbo hbt hby hha hhb hhh hhn hho hht hhy hna hnb hnh hnn hno hnt hny hoa hob hoh hon hoo hot hoy hta htb hth htn hto htt hty hy- hya hyb hyh hyn hyo hyt hyy naa nab nah nan nao nat nay nba nbb nbn nbo nbt nha nhb nhh nhn nht nhy nna nnb nnh nnn nno nnt no- noa nob noh non noo not noy nta ntb nth ntn nto ntt nya nyn nyo nyt nyy oaa oab oah oan oao oat ob- oba obb obh obn obo obt oby oha ohh ohn oho oht on- ona onb onh onn ono ont ony oo- ooa oob ooh oon ooo oot ot- ota otb oth otn oto ott oya oyo taa tab tah tan tao tat tay tba tbb tbh tbn tbo tbt th- tha thb thh thn tho tht thy tna tnb tnh tnn tno tnt to- toa tob toh ton too tot toy tta ttb tth ttn tto ttt tty tya tyn tyo tyt yaa yab yah yan yao yat yay yby yha yht yna ynn yny yob yon yoo yot yoy yta yth ytn yto ytt yyb yyt yyy