TRISTISONOUS

in is it no nu oi on or os si so ti to un us ut

ins ion its nit noo nor nos not nus nut ono ons oot ors ort our out rin rot run rut sin sir sis sit son sos sot sou sri sun tin tis tit ton too tor tot tui tun tut uns urn uts

inro inti into ions iris iron nisi nits noir nori nous nuts onos onto onus oots orts otto ours oust outs rins riot root roti roto rots rout ruin runs runt rust ruts sins sirs sits snit snot sons soon soot sori sorn sort sots sour sous sris stir stot stun suit suns suss tins tint tiro titi tits toit tons toon toot tori torn toro tors tort toss tost tots tour tout trio trot tuis tuns turn tuts unit unto urns