ddd ddi ddp ddr ddt di- did dii dip dir dit dpd dpi dpp dpr dpt drd dri drp drr drt dtd dti dtp dtr dtt i-d idd idi idp idr idt iid iii iip iir iit ipd ipi ipp ipr ipt ir- ird iri irp irr irt itd iti itp itt p-p pdd pdi pdp pdr pdt pid pii pip pir pit ppd ppi ppp ppr ppt prd pri prp prr prt pt- ptd pti ptp ptr ptt rdd rdi rdp rdr rdt rid rii rip rir rit rpd rpi rpp rpr rpt rrd rri rrp rrr rrt rtd rti rtp rtr rtt tdd tdi tdp tdr tdt tid tii tip tir tit tpd tpi tpp tpr tpt trd tri trp trr trt ttd tti ttp ttr ttt