-th a-a a-t aaa aad aaf aah aat ad- ada add adf adh adt af- afa afd aff afh aft aha ahd ahf ahh aht at- ata atd atf ath att daa dad daf dah dat dda ddd ddf ddh ddt dfa dfd dff dfh dft dh- dha dhd dhf dhh dht dta dtd dtf dth dtt faa fad faf fah fat fda fdd fdf fdh fdt ffa ffd fff ffh fft fha fhf fhh fta ftd ftf fth ftt haa had haf hah hat hda hdd hdf hdh hdt hfa hfd hff hfh hft hha hhd hhf hhh hht hta htd htf hth htt taa tad taf tah tat tda tdd tdf tdh tdt tfa tfd tff tfh tft th- tha thd thf thh tht tta ttd ttf tth ttt