-er a-a a-t aaa aae aaf aap aar aat aea aee aef aep aer aet af- afa afe aff afp afr aft ap- apa ape apf app apr apt ar- ara are arf arp arr art at- ata ate atf atp atr att eaa eae eaf eap ear eat eea eee eef eep eer eet ef- efa efe eff efp efr eft ep- epa epe epf epp epr ept era ere erf erp err ert eta ete etf etp etr ett faa fae faf fap far fat fea fee fef fep fer fet ffa ffe fff ffp ffr fft fpa fpe fpp fpr fpt fra fre frf frp frr frt fta fte ftf ftp ftr ftt p-p paa pae paf pap par pat pea pee pef pep per pet pfa pfe pff pfp pfr pft ppa ppe ppf ppp ppr ppt pra pre prf prp prr prt pt- pta pte ptf ptp ptr ptt ra- raa rae raf rap rar rat re- rea ree ref rep rer ret rfa rfe rff rfp rfr rft rpa rpe rpf rpp rpr rpt rra rrf rrp rrr rrt rta rte rtf rtp rtr rtt taa tae taf tap tar tat te- tea tee tef tep ter tet tfa tfe tff tfp tfr tft tpa tpe tpf tpp tpr tpt tra tre trf trp trr trt tta tte ttf ttp ttr ttt