Phonological opacity is well-studied and there are numerous proposals in the literature which analyze opacity in Optimality-Theoretic grammars. However. many analyses include significant elaborations to the basic architecture of Optimality Theory (Prince & Smolensky 1993/2004) or its serial alternative. Harmonic Serialism (McCarthy 2000). https://safeersappliancers.shop/product-category/bosch-serie-4-wan282x0gb-8-kg-1400-spin-washing-machine-inox/