-er eee eef eep eer eet ef- efe eff efi efp efr eft eie eif eii eip eir eit ep- epe epf epi epp epr ept epz ere erf eri erp err ert erz ete etf eti etp etr ett etz eze ezf ezr ezz fee fef fei fep fer fet fez ffe fff ffi ffp ffr fft ffz fie fif fii fip fir fit fiz fpe fpi fpp fpr fpt fre frf fri frp frr frt fte ftf fti ftp ftr ftt ftz i-f ie- iee ief iei iep ier iet ife iff ifi ifp ifr ift ifz iie iif iii iip iir iit ipe ipf ipi ipp ipr ipt ir- ire irf iri irp irr irt ite itf iti itp itt itz ize izi izz p-p pee pef pei pep per pet pez pfe pff pfi pfp pfr pft pie pif pii pip pir pit piz ppe ppf ppi ppp ppr ppt ppz pre prf pri prp prr prt prz pt- pte ptf pti ptp ptr ptt ptz pzp pzt re- ree ref rei rep rer ret rez rfe rff rfi rfp rfr rft rfz rie rif rii rip rir rit riz rpe rpf rpi rpp rpr rpt rpz rrf rri rrp rrr rrt rte rtf rti rtp rtr rtt rtz rze te- tee tef tei tep ter tet tez tfe tff tfi tfp tfr tft tie tif tii tip tir tit tiz tpe tpf tpi tpp tpr tpt tpz tre trf tri trp trr trt trz tte ttf tti ttp ttr ttt tze tzf zee zef zep zer zet zez zfr zie zif zip zir zit ziz zpe zpf zpi zpp zpr zpt zrp zte ztr zzr zzt zzz