iii iin iio iis iix iki ikk iko iks ikx in- ini ink inn ino ins inx io- ioi ion ioo ios is- isi isk isn iso iss ixi ixn kii kik kin kio kis kix kki kkk kkn kks kn- kni knk knn kno knx koi kok kon koo kos ksi ksk ksn kso kss kxo n-i nii nik nin nio nis nix nki nkk nkn nko nks nni nnk nnn nno nns no- noi nok non noo nos nox nsi nsk nsn nso nss nsx o-i oii oik oin oio ois oki okk oko oks on- oni onk onn ono ons onx oo- ooi ook oon ooo oos oox os- osi osk osn oso oss osx ox- oxi oxn oxo oxx sii sik sin sio sis six sk- ski skk sko sks skx sni snk snn sno sns soi sok son soo sos sox ss- ssi ssk ssn sso sss ssx sxi sxn sxs xii xin xio xis xix xks xnk xno xns xoi xok xon xoo xos xox xsi xss xxi xxo xxx