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| layer at (0,0) size 800x600 |
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| LayoutBlockFlow {BODY} at (0,0) size 800x600 |
| LayoutBlockFlow {DIV} at (0,0) size 800x20 |
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| text run at (0,0) width 430: "Two green 16x16 pixel squares should appear below stacked vertically." |
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| LayoutImage {IMG} at (0,0) size 16x16 |
| LayoutText {#text} at (0,0) size 0x0 |
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| LayoutText {#text} at (0,0) size 0x0 |
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| layer at (0,0) size 16x16 |
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