When shall we three meet again?
In thunder, lightning, or in rain?
When the hurly-burly's done,
When the battle's lost and won.
That will be ere the set of sun.
Where the place?
Upon the heath.
There to meet with Macbeth. $$
Consider the 1st two lines:
scanning from left to right we erase:
hen, wet, gain,
leaving: W shall hree meet a? In thunder... etc
Now erase: wall,she,het
and we are left with re me etc letters that can be used
to continue (rain ?)..etc
Each word of n letters credits you with n2 points.
Apply the above procedure to the text between $$ and $$. From the total amount of your points deduct the number of letters left over.
The scanning is similar to that in my puzzle "More words from your word" but here once you use some letters you erase them from the text and you continue until it is impossible to proceed.
Then evaluate your score.
The usual restrictions re admissibility of words apply.