Number 15 yellow. TMY-2 at 400 leaves me setting my spot meter to 160 (for the 1 1/2 stop filter comp) The darkest windows I wanted just the slightest hint of detail, and that put the highest of the high values only 5 stops brighter. f22 at 1/30th sec was enough exposure to place the darkest shadowed window at a zone 2, and I gave this roll N+1 development to pop the contrast up a bit. The nice thing about Pyro and other staining developers is that there are usually enough details in the denser parts of the negative to burn those values down in the printing process, though I had to do nothing significant to this print, other than cropping out the foreground.