On Tue, Nov 8, 2011 at 1:03 PM, André Müller <esperantist at gmail.com> wrote:
> CVw' = 21x1 = 21
> CVy' = 21x4 = 84
I don't believe you're justified in calling {-Iw'}, {-ew'}, and {-Iy'}
"impossible" just because you've never seen them.
-- ghunchu'wI'