[un_pogaz]

Meh, too bad, but predictable.
For information, here is my code for the strcase function (more consistent with Calibre standards)

strcase(x, y, lt, eq, gt)

def evaluate(self, formatter, kwargs, mi, locals, x, y, lt, eq, gt):
    from calibre.utils.icu import case_sensitive_strcmp as strcmp
    v = strcmp(x, y)
    if v < 0:
        return lt
    if v == 0:
        return eq
    return gt

strcase(x, y, lt, eq, gt) -- does a case-sensitive comparison of x and y as strings. Returns lt if x < y. Returns eq if x == y. Otherwise returns gt.

Note, I'm thinking if I commit this to Calibre. Literals operator are unnecessary for a such marginal case, but providing a build-in function would be useful, so you don't have to look up how to do it if you ever need it.