-th a-a a-t aaa aad aah aat aay ad- ada add adh adt ady aha ahd ahh aht ahy at- ata atd ath att ay- aya ayd ayh ayt daa dad dah dat day dda ddd ddh ddt ddy dh- dha dhd dhh dht dta dtd dth dtt dty dy- dya dyd dyy haa had hah hat hay hda hdd hdh hdt hdy hha hhd hhh hht hhy hta htd hth htt hty hy- hya hyd hyh hyt hyy taa tad tah tat tay tda tdd tdh tdt tdy th- tha thd thh tht thy tta ttd tth ttt tty tya tyd tyt yaa yad yah yat yay yda ydt ydy yha yht yta ytd yth ytt yyt yyy