a-a a-t aaa aaf aap aar aat af- afa aff afp afr aft ap- apa apf app apr apt ar- ara arf arp arr art at- ata atf atp atr att faa faf fap far fat ffa fff ffp ffr fft fpa fpp fpr fpt fra frf frp frr frt fta ftf ftp ftr ftt p-p paa paf pap par pat pfa pff pfp pfr pft ppa ppf ppp ppr ppt pra prf prp prr prt pt- pta ptf ptp ptr ptt ra- raa raf rap rar rat rfa rff rfp rfr rft rpa rpf rpp rpr rpt rra rrf rrp rrr rrt rta rtf rtp rtr rtt taa taf tap tar tat tfa tff tfp tfr tft tpa tpf tpp tpr tpt tra trf trp trr trt tta ttf ttp ttr ttt