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

This is a signature puzzle named 'Flint'

The 5 elements in each group of this type of puzzle are: F, L, I, N, and T.

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

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

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

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

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

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

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