Viewport <#document> at [0,0] [0+0+0 800 0+0+0] [0+0+0 600 0+0+0] [BFC] children: not-inline
  BlockContainer <html> at [0,0] [0+0+0 800 0+0+0] [0+0+0 413 0+0+0] [BFC] children: not-inline
    BlockContainer <body> at [8,8] [8+0+0 784 0+0+8] [8+0+0 5 0+0+8] children: not-inline
      BlockContainer <div.a> at [8,8] [0+0+0 100 0+0+684] [0+0+0 5 0+0+0] children: inline
        frag 0 from TextNode start: 5, length: 1, rect: [8,8 3.828125x5] baseline: 4
            "H"
        TextNode <#text> (not painted)
        BlockContainer <div.b.l> at [8,13] floating [0+0+0 100 0+0+0] [0+0+0 100 0+0+0] [BFC] children: not-inline
        TextNode <#text> (not painted)
        BlockContainer <div.c.l> at [8,113] floating [0+0+0 30 0+0+0] [0+0+0 300 0+0+0] [BFC] children: not-inline
        TextNode <#text> (not painted)
        BlockContainer <div.c.r> at [78,113] floating [0+0+0 30 0+0+0] [0+0+0 300 0+0+0] [BFC] children: not-inline
        TextNode <#text> (not painted)
      BlockContainer <(anonymous)> at [8,13] [0+0+0 784 0+0+0] [0+0+0 0 0+0+0] children: inline
        TextNode <#text> (not painted)

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x413]
    PaintableWithLines (BlockContainer<BODY>) [8,8 784x5]
      PaintableWithLines (BlockContainer<DIV>.a) [8,8 100x5]
        PaintableWithLines (BlockContainer<DIV>.b.l) [8,13 100x100]
        PaintableWithLines (BlockContainer<DIV>.c.l) [8,113 30x300]
        PaintableWithLines (BlockContainer<DIV>.c.r) [78,113 30x300]
      PaintableWithLines (BlockContainer(anonymous)) [8,13 784x0]

SC for Viewport<#document> [0,0 800x600] (z-index: auto)
 SC for BlockContainer<HTML> [0,0 800x413] (z-index: auto)
