IRIDONCUS

do id in is no nu od oi on or os si so un us

cis cod con cor cos cru cud cur din dis doc don dor dos dui dun duo ids ins ion nod nor nos nus ods ons orc ors oud our rid rin roc rod run sic sin sir sod son sou sri sun udo uns urd urn

cion cods coin coir coni cons cord corn cors cris crud crus cuds curd curn curs dino dins disc docs dons dors dour duci duns duos durn duro icon inro ions irid iris iron nidi nisi nodi nods noir nori nous nurd odic onus orcs ouds ours rids rind rins rocs rods ruin runs scud sord sori sorn sour surd udon udos unci unco undo urds uric urns