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2 RenderView at (0,0) size 800x600
3 layer at (0,0) size 800x600
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5 RenderBody {BODY} at (8,8) size 784x576
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8 text run at (0,0) width 77: "Hello world"
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11 text run at (0,0) width 220: "The number of matched rules is: 1"