PROMITOSIS

is it mi mo oi om op or os pi si so ti to

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impi imps iris isms mips miri mirs miso miss mist moor moos moot mops mors mort moss most mots omit oops oots opts orts piso piss pits pois pomo poms poor poos port post pots prim prom pros psis psst rims riot rips romp roms room root roti roto rots simp sims sips sirs sits smit soms soot sops sori sort sots spit spot sris stir stop tipi tips tiro toms toom topi topo tops tori toro tors toss trim trio trip trop