"Things You Wouldn't Know If We Didn't Blog Intermittently."
A lawyer wrote our national anthem?!?! Well, that explains a few things.
Your young mind was a cabinet of curiosities -- and that's good!
IIRC, the key is the fifth ring from the left which, when severed, releases two chains of lengths 4 and 6. Then one more cut can generate a "2," after which one has the "denominations" for creating combinations up to 11.