fff ffi ffp ffr fft fif fii fip fir fit fpi fpp fpr fpt frf fri frp frr frt ftf fti ftp ftr ftt i-f iff ifi ifp ifr ift iif iii iip iir iit ipf ipi ipp ipr ipt ir- irf iri irp irr irt itf iti itp itt p-p pff pfi pfp pfr pft pif pii pip pir pit ppf ppi ppp ppr ppt prf pri prp prr prt pt- ptf pti ptp ptr ptt rff rfi rfp rfr rft rif rii rip rir rit rpf rpi rpp rpr rpt rrf rri rrp rrr rrt rtf rti rtp rtr rtt tff tfi tfp tfr tft tif tii tip tir tit tpf tpi tpp tpr tpt trf tri trp trr trt ttf tti ttp ttr ttt