Sigh.
I kept looking at the durn thing, almost daily. Your posting has saved me another try 'cause when I saw it - I persuaded myself I was never going to get it.
So I looked at your answer.
Oi!
I really wouldn't have gotten that solution ... not in a bazillion years!
So, now I'm glad I gave up and looked. Now, I can throw away the graph paper (& put away the scissors, pencil and eraser!).
Thanks for the puzzle, pdurrant. Eventually, I will get one without having to peek ... !!!
Marilyn
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