Detailed instructions for working a group puzzle of type 'Madison'

This is a signature puzzle named 'Madison'

The 7 elements in each group of this type of puzzle are: M, A, D, I, S, O, and N.

Every group in the puzzle must contain exactly this set of elements.

Each row is a group numbered as shown in this Madison figure.

In a Madison puzzle, each row is a group numbered as shown in the figure above.

Each column is a group numbered as shown in this Madison figure.

In a Madison puzzle, each column is a group numbered as shown in the figure above.

Each septomino is a group numbered as shown in this Madison figure.

In a Madison puzzle, each septomino is a group numbered as shown in the figure above.