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

This is a signature puzzle named 'Clark'

The 5 elements in each group of this type of puzzle are: C, L, A, R, and K.

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

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

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

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

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

Each pentomino is a group numbered as shown in this Clark figure.

In a Clark puzzle, each pentomino is a group numbered as shown in the figure above.