iii iio iis iit iki ikk iko iks ikt io- ioi ioo ios iot is- isi isk iso iss ist iti itk ito its itt k-t kii kik kio kis kit kki kkk kks kkt koi kok koo kos kot ksi ksk kso kss kst ktk kto kts ktt o-i oii oik oio ois oit oki okk oko oks oo- ooi ook ooo oos oot os- osi osk oso oss ost ot- oti otk oto ots ott sii sik sio sis sit sk- ski skk sko sks skt soi sok soo sos sot ss- ssi ssk sso sss sst sti stk sto sts stt tii tik tio tis tit tkk tko tks tkt to- toi tok too tos tot tsi tsk tso tss tst tti ttk tto tts ttt