iii iin iio iis iki ikk iko iks in- ini ink inn ino ins io- ioi ion ioo ios is- isi isk isn iso iss kii kik kin kio kis kki kkk kkn kks kn- kni knk knn kno koi kok kon koo kos ksi ksk ksn kso kss n-i nii nik nin nio nis nki nkk nkn nko nks nni nnk nnn nno nns no- noi nok non noo nos nsi nsk nsn nso nss o-i oii oik oin oio ois oki okk oko oks on- oni onk onn ono ons oo- ooi ook oon ooo oos os- osi osk osn oso oss sii sik sin sio sis sk- ski skk sko sks sni snk snn sno sns soi sok son soo sos ss- ssi ssk ssn sso sss