-er eee eep eer ees eet eev eie eii eip eir eis eit eiv ep- epe epi epp epr eps ept ere eri erp err ers ert erv es- ese esi esp esr ess est esv ete eti etp etr ets ett etv eve evi evp evr evs evt evv i-v ie- iee iei iep ier ies iet iev iie iii iip iir iis iit ipe ipi ipp ipr ips ipt ipv ir- ire iri irp irr irs irt irv is- ise isi isp isr iss ist isv ite iti itp its itt itv ive ivi ivp ivr ivs ivt ivv p-p pee pei pep per pes pet pev pie pii pip pir pis pit piv ppe ppi ppp ppr pps ppt ppv pre pri prp prr prs prt prv ps- pse psi psp psr pss pst psv pt- pte pti ptp ptr pts ptt ptv pve pvi pvp pvr pvs pvt pvv re- ree rei rep rer res ret rev rie rii rip rir ris rit riv rpe rpi rpp rpr rps rpt rpv rri rrp rrr rrs rrt rse rsi rsp rsr rss rst rsv rte rti rtp rtr rts rtt rtv rve rvi rvp rvr rvs rvt rvv se- see sei sep ser ses set sev sie sii sip sir sis sit siv spe spi spp spr sps spt spv sr- sre sri srp srr srs srt srv ss- sse ssi ssp ssr sss sst ssv ste sti stp str sts stt stv sve svi svp svr svs svt svv te- tee tei tep ter tes tet tev tie tii tip tir tis tit tiv tpe tpi tpp tpr tps tpt tpv tre tri trp trr trs trt trv tse tsi tsp tsr tss tst tsv tte tti ttp ttr tts ttt ttv tve tvi tvp tvr tvs tvt v-e vee vei vep ver ves vet vi- vie vii vip vir vis vit viv vpe vpi vpp vpr vps vpt vre vri vrp vrr vrs vrt vse vsi vsp vsr vss vst vsv vte vti vtr vts vtt vtv vvi vvr vvs vvt vvv