iiooio iniron initio inonit inroot intoit intort intoto intro- intron ionion ionto- ironii ironin ironon itinto ittiri ittro- n-toon ninino nintin nintoo nitori nitro- nitron no-rin noiron non-no nonini nonino nonono nonoon nontin noonoo noonor noonto noriti norito noroit norrin norton notion notron notton nottoo oniro- onnion ononin oooooo oroton ortnit ototoi ottoii ottoor rintin ritini rititi ritto ronino ronion ronnon ronron rootin rooton rotini rotino rotton tintin tinton tintri tirrit titini titiri titoni titron to-on to-rit toitoi tonini tonino tonono tonoro tonton tootin tootoo torino torito tornio tornit toroni torori tororo torrin torrit tortor totino totnor totoro totrot tottoi trinoo trito- triton tritor tronto trotro