20 materials for tails, 30 materials for bodies, 20 materials for thoraxes, 10 materials for hackles and 15 materials for wings (and I always used all of them, and didn't even create ribs), I could tie 1,800,000 diferent flies and put one on the board every day for 4,931.5 years without repeating.
But I would have trouble thinking of all those names.

I don't look at the fly tying section much anymore.