Example of non-reduced Noetherian dimension 1 Cohen-Macaulay ring.

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As the name suggested, is there a non-reduced Noetherian dimension 1 Cohen-Macaulay ring? I know that all reduced Noetherian ring with dimension 1 is Cohen-Macaulay, however it seems difficult for me to create a concrete example of non-reduced Cohen-Macaulay ring with dimension 1.

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What about this ring: $k[x,y]/(x^2)$?