COSTIFORM

if is it mi mo of oi om or os si so ti to

cis coo cor cos cot fir fit for fro ifs ism its mic mir mis moc moo mor mos mot oft oms oot orc ors ort rif rim roc rom rot sic sim sir sit som sot sri tic tis tom too tor

cist coft coif coir coof coos coot corf corm cors cost cots cris crit fico firm firs fisc fist fits foci foot form fort frit from mics mirs miso mist mocs moor moos moot mors mort most mots omit oots orcs orts otic rifs rift rims riot rocs roms roof room root roti roto rots scot sift smit soft soot sori sort stir tics tiro toms toom torc tori toro tors trim trio