TRIOLCOUS

is it li lo oi or os si so ti to us ut

cis col coo cor cos cot cru cur cut its lis lit loo lot oil oot orc ors ort our out roc rot rut sic sir sit sol sot sou sri tic til tis too tor tui uts

cist clot coil coir cols colt cool coos coot cors cost cots cris crit crus cult curl curs curt cuts list lits litu loci loco loos loot lost loti lots lour lout lust oils olio oots orcs orts otic ours oust outs riot rocs roil root roti rotl roto rots rout rust ruts scot scut silo silt slit slot slur slut soil soli solo soot sori sort soul sour stir suit tics tils tirl tiro toil tolu tool torc tori toro tors tour trio tuis uric