c-- ccc ccd ccf ccp cct cdc cdd cdf cdp cdt cfc cfd cff cfp cft cpc cpd cpf cpp cpt ctc ctd ctf ctp ctt dcc dcd dcf dcp dct ddc ddd ddf ddp ddt dfc dfd dff dfp dft dpc dpd dpf dpp dpt dtc dtd dtf dtp dtt fcc fcd fcf fcp fct fdc fdd fdf fdp fdt ffc ffd fff ffp fft fpc fpd fpp fpt ftc ftd ftf ftp ftt p-p pcc pcd pcf pcp pct pdc pdd pdf pdp pdt pfc pfd pff pfp pft ppc ppd ppf ppp ppt pt- ptc ptd ptf ptp ptt tcc tcd tcf tcp tct tdc tdd tdf tdp tdt tfc tfd tff tfp tft tpc tpd tpf tpp tpt ttc ttd ttf ttp ttt