eee eef eek eeo ees eet ef- efe eff efi efo efs eft eie eif eii eik eio eis eit eke ekf eki eko eks ekt eo- eoe eof eoi eok eoo eos eot es- ese esf esi esk eso ess est ete etf eti etk eto ets ett fee fef fei fek feo fes fet ffe fff ffi ffk ffo ffs fft fie fif fii fik fis fit fkf fki fkk fkt foe fof foi fok foo fos fot fse fsf fsi fsk fso fss fst fte ftf fti ftk fto fts ftt i-f ie- iee ief iei iek ies iet ife iff ifi ifo ifs ift iie iif iii iio iis iit ike ikf iki ikk iko iks ikt io- ioe iof ioi ioo ios iot is- ise isf isi isk iso iss ist ite itf iti itk ito its itt k-t ke- kee kef kei kek keo kes ket kff kfi kfo kfs kie kif kii kik kio kis kit kke kki kkk kks kkt koe kof koi kok koo kos kot kse ksf ksi ksk kso kss kst kte ktf ktk kto kts ktt o-i oee oef oei oeo oes oet of- ofe off ofi ofo ofs oft oie oif oii oik oio ois oit oke oki okk oko oks oo- oof ooi ook ooo oos oot os- ose osf osi osk oso oss ost ot- ote otf oti otk oto ots ott se- see sef sei sek seo ses set sfe sff sfi sfk sfo sfs sft sie sif sii sik sio sis sit sk- ske skf ski skk sko sks skt soe sof soi sok soo sos sot ss- sse ssf ssi ssk sso sss sst ste stf sti stk sto sts stt te- tee tef tei tek teo tes tet tfe tff tfi tfk tfo tfs tft tie tif tii tik tio tis tit tke tkk tko tks tkt to- toe tof toi tok too tos tot tse tsf tsi tsk tso tss tst tte ttf tti ttk tto tts ttt