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

This is a signature puzzle named 'Wilburt'

The 7 elements in each group of this type of puzzle are: W, I, L, B, U, R, and T.

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

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

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

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

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

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

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