Detailed instructions for working a group puzzle of type 'Cathy'
This is a signature puzzle named 'Cathy'
The 5 elements in each group of this type of puzzle are: C, A, T, H, and Y.
Every group in the puzzle must contain exactly this set of elements.
In a Cathy puzzle, each row is a group numbered as shown in the figure above.
In a Cathy puzzle, each column is a group numbered as shown in the figure above.
In a Cathy puzzle, each pentomino is a group numbered as shown in the figure above.