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

This is a signature puzzle named 'Britney'

The 7 elements in each group of this type of puzzle are: B, R, I, T, N, E, and Y.

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

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

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

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

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

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

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