1. Second list item
  2. Fourth list item
  3. Sixth list item
1.1 1.2 1.3
2.1 2.2 2.3
3.1 3.2 3.3
4.1 4.2 4.3

1.1 1.4 1.7
2.1 2.4 2.7
3.1 3.4 3.7