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

This is a signature puzzle named 'Thomas'

The 6 elements in each group of this type of puzzle are: T, H, O, M, A, and S.

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

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

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

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

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

Each 3x2 rectangle is a group numbered as shown in this Thomas figure.

In a Thomas puzzle, each 3x2 rectangle is a group numbered as shown in the figure above.