1. A simple table

   	aaa	bbbbbbb	ccc
   ddd	eeeeeee	fff	ggggggg

2. Background colors and alignment

   	aaa	bbbbbbb	ccc
   ddd	eeeeeee	fff	ggggggg

3. Column span

   	aaa	bbbbbbb	ccc
   ddd	eeeeeee	fffggggggg

4. Row span

   ddd	aaa	bbbbbbb	ccc
   	eeeeeee	fff	ggggggg