DUOPOLISTIC

do id is it li lo od oi op os pi si so ti to up us ut

cis cod col coo cop cos cot cud cup cut dip dis dit doc dol dos dot dui duo dup ids its lid lip lis lit loo lop lot ods oil old oot ops opt oud out pic pis pit piu pod poi pol poo pot psi pst pud pul pus put sic sip sit sod sol sop sot sou sup tic til tip tis tod too top tui tup udo upo ups uts

cist clip clod clop clot cods coil cold cols colt cool coop coos coot cops cost cots coup cuds cult cups cusp cuts diol dips dipt disc dits docs doit dols dolt dost dots duci duct duit duos dups dust idol lido lids lips lisp list lits litu loci loco loid loop loos loot lops lost loti lots loud loup lout lust odic oils olds olio oops oots opts opus otic ouds oust outs pics pili piso pits plod plot plus poco pods pois polo pols pood pool poos post pots pout ptui puds puli puls puts scop scot scud scup scut sild silo silt slid slip slit slop slot slut soil sold soli solo soot soul soup spic spit spot spud stop stud suit tics tils tipi tips tods toil told tolu tool topi topo tops tuis tups udos updo