Viewport <#document> at [0,0] [0+0+0 800 0+0+0] [0+0+0 600 0+0+0] children: not-inline
  BlockContainer <html> at [0,0] [0+0+0 800 0+0+0] [0+0+0 64 0+0+0] [BFC] children: not-inline
    BlockContainer <body> at [8,8] [8+0+0 784 0+0+8] [8+0+0 48 0+0+8] children: not-inline
      Box <div.a> at [8,8] [0+0+0 784 0+0+0] [0+0+0 48 0+0+0] [GFC] children: not-inline
        BlockContainer <(anonymous)> (not painted) [BFC] children: inline
          TextNode <#text> (not painted)
        BlockContainer <div.b> at [8,8] [0+0+0 48 0+0+0] [0+0+0 48 0+0+0] [BFC] children: not-inline
        BlockContainer <(anonymous)> (not painted) [BFC] children: inline
          TextNode <#text> (not painted)
        BlockContainer <div.c> at [56,8] [0+0+0 48 0+0+0] [0+0+0 48 0+0+0] [BFC] children: not-inline
        BlockContainer <(anonymous)> (not painted) [BFC] children: inline
          TextNode <#text> (not painted)
      BlockContainer <(anonymous)> at [8,56] [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 800x64]
    PaintableWithLines (BlockContainer<BODY>) [8,8 784x48]
      PaintableBox (Box<DIV>.a) [8,8 784x48]
        PaintableWithLines (BlockContainer<DIV>.b) [8,8 48x48]
        PaintableWithLines (BlockContainer<DIV>.c) [56,8 48x48]
      PaintableWithLines (BlockContainer(anonymous)) [8,56 784x0]

SC for Viewport<#document> [0,0 800x600] [children: 1] (z-index: auto)
 SC for BlockContainer<HTML> [0,0 800x64] [children: 0] (z-index: auto)
