-th eee eek eeo ees eet eex ehe ehh eho ehs eht eke ekh eko eks ekt eo- eoe eoh eok eoo eos eot es- ese esh esk eso ess est esx ete eth etk eto ets ett etx ex- exe exh exo exs ext exx he- hee heh hek heo hes het hex hhe hhh hhk hho hhs hht hkh hkk hko hks hkt hoe hoh hok hoo hos hot hox hse hsh hsk hss hst hsx hte hth htk hto hts htt htx k-t ke- kee keh kek keo kes ket kex khe khh khk kho khs kke kkh kkk kks kkt koe koh kok koo kos kot kse ksh ksk kso kss kst kte kth ktk kto kts ktt kxo oee oeh oeo oes oet oex ohe ohh oho ohs oht oke okk oko oks oo- ooh ook ooo oos oot oox os- ose osh osk oso oss ost osx ot- ote oth otk oto ots ott ox- oxo oxt oxx se- see seh sek seo ses set sex sh- she shh shk sho shs sht sk- ske skh skk sko sks skt skx soe soh sok soo sos sot sox ss- sse ssh ssk sso sss sst ssx ste sth stk sto sts stt stx sxs sxt t-x te- tee teh tek teo tes tet tex th- the thh thk tho ths tht thx tke tkk tko tks tkt to- toe toh tok too tos tot tox tse tsh tsk tso tss tst tsx tte tth ttk tto tts ttt ttx txe txk txs txt xee xes xet xex xht xke xks xok xoo xos xot xox xss xst xts xtx xxo xxx