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

This is a signature puzzle named 'Muriel'

The 6 elements in each group of this type of puzzle are: M, U, R, I, E, and L.

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

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

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

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

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

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

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