-er eee eek eeo eer ees eet eew eex eke eko ekr eks ekt eo- eoe eok eoo eor eos eot eow ere erk ero err ers ert erw es- ese esk eso esr ess est esw esx ete etk eto etr ets ett etw etx ewe ewk ewo ewr ews ewt eww ex- exe exo exr exs ext exw exx k-t ke- kee kek keo ker kes ket kew kex kke kkk kkr kks kkt koe kok koo kor kos kot kow krk kro krr krs krt krw kse ksk kso ksr kss kst ksw kte ktk kto ktr kts ktt ktw kw- kwk kwo kws kwt kww kxo oee oeo oer oes oet oex oke okk oko okr oks okw oo- ook ooo oor oos oot oow oox or- ore ork oro orr ors ort orx os- ose osk oso osr oss ost osw osx ot- ote otk oto otr ots ott otw owe owk owo ows owt oww ox- oxo oxt oxx re- ree rek reo rer res ret rew rex rke rkk rko rks rkt roe rok roo ror ros rot row rox rrk rrr rrs rrt rse rsk rso rsr rss rst rsw rsx rte rtk rto rtr rts rtt rtw rtx rwe rwr rws rxr rxs se- see sek seo ser ses set sew sex sk- ske skk sko skr sks skt skw skx soe sok soo sor sos sot sow sox sr- sre srk sro srr srs srt srw srx ss- sse ssk sso ssr sss sst ssw ssx ste stk sto str sts stt stw stx swe swk swo swr sws swt sxs sxt t-x te- tee tek teo ter tes tet tew tex tke tkk tko tkr tks tkt tkw to- toe tok too tor tos tot tow tox tre trk tro trr trs trt trw trx tse tsk tso tsr tss tst tsw tsx tte ttk tto ttr tts ttt ttw ttx twe two twr tws twt tww twx txe txk txs txt wee wek weo wer wes wet wew wex wke wko wkr wks wkt wkw woe wok woo wor wos wot wow wox wr- wre wrk wro wrr wrs wrt wrw wrx wse wsk wso wsr wss wst wsw wsx wto wtr wts wtt wtw wtx wwe wwo wwt www wxw xee xer xes xet xew xex xke xks xok xoo xor xos xot xox xrt xrx xss xst xtr xts xtx xwt xxo xxx