In the "qconvex outputs" part of the Qhull manual on this website, for the "o" option, it reads

print vertices and facets of the convex hull in OFF format. The first line is the dimension. The second line is the number of vertices, facets, and ridges. The vertex coordinates are next, followed by the facets. Each facet starts with the number of vertices...

However, the "o" option actually prints the (input) points and facets of the convex hull in OFF format. Thus, the above quote should be

print points and facets of the convex hull in OFF format. The first line is the dimension. The second line is the number of points, facets, and ridges. The point coordinates are next, followed by the facets. Each facet starts with the number of vertices...