-er eee eeo eer ees eet eo- eoe eoo eor eos eot ere ero err ers ert es- ese eso esr ess est ete eto etr ets ett oee oeo oer oes oet oo- ooo oor oos oot or- ore oro orr ors ort os- ose oso osr oss ost ot- ote oto otr ots ott re- ree reo rer res ret roe roo ror ros rot rrr rrs rrt rse rso rsr rss rst rte rto rtr rts rtt se- see seo ser ses set soe soo sor sos sot sr- sre sro srr srs srt ss- sse sso ssr sss sst ste sto str sts stt te- tee teo ter tes tet to- toe too tor tos tot tre tro trr trs trt tse tso tsr tss tst tte tto ttr tts ttt