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

This is a signature puzzle named 'Gilbert'

The 7 elements in each group of this type of puzzle are: G, I, L, B, E, 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 Gilbert figure.

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

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

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

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

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