+ k = new("2001:3c01::1:0", 120)
+ print "supernet: ", str(j), " supernet of ", str(k), "? ", \
+ str(j.is_supernet(k))
+ print "supernet: ", str(k), " supernet of ", str(j), "? ", \
+ str(k.is_supernet(j))
+ print "subnet: ", str(j), " subnet of ", str(k), "? ", \
+ str(j.is_subnet(k))
+ print "subnet: ", str(k), " subnet of ", str(j), "? ", \
+ str(k.is_subnet(j))