diff --git a/images/valley.jpg b/images/valley.jpg
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diff --git a/latexmkrc b/latexmkrc
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--- a/latexmkrc
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@@ -1,4 +0,0 @@
-$texprefix = 'demo';
-$pdf_mode = 1;
-$dvi_mode = $postscript_mode = 0;
-$pdflatex = 'lualatex --shell-escape %O %S';
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