This item spans rows 1 and 2 and spans cols 1 and 2 1.3 1.4
2.3 2.4
3.1 3.2 This item spans rows 3 and 4 and spans cols 3 and 4.
4.1 4.2

This item spans rows 1 and 2. 1.2 1.3
2.2 This item spans rows 2 and 3.
3.1 3.2