20 people in a circle

[LCKurtz]

That;'s impressive cubist. I'm getting too old for this kind of stuff.

 

[Cubist]

That;'s impressive cubist. I'm getting too old for this kind of stuff.

You're never too old - keep on keeping on! (Unless it's likely to cause injury ? )

Personally I've only learned (a bit) about inclusion-exclusion in the last month or so. I can't remember using it before now. @Dr.Peterson has written some good posts about it (on this forum).