ddd ddf ddk ddp ddt dfd dff dfk dfp dft dkk dkp dkt dpd dpf dpk dpp dpt dtd dtf dtk dtp dtt fdd fdf fdk fdp fdt ffd fff ffk ffp fft fkf fkk fkp fkt fpd fpk fpp fpt ftd ftf ftk ftp ftt k-t kdf kdk kdp kdt kfd kff kkk kkp kkt kpd kpf kpk kpp kpt ktf ktk ktp ktt p-p pdd pdf pdk pdp pdt pfd pff pfk pfp pft pkd pkf pkp pkt ppd ppf ppk ppp ppt pt- ptd ptf ptk ptp ptt tdd tdf tdk tdp tdt tfd tff tfk tfp tft tkk tkp tkt tpd tpf tpk tpp tpt ttd ttf ttk ttp ttt