Complete function which called "set$\_$symmetric$\_$difference$\_$operation", it finds symmetric difference of set.

def set$\_$synsetric$\_$difference$\_$operation$($self$)$:

return

return self.sample$\_$set $2-$ self.sample$\_$set $1$

return self.sample$\_$set $1|$ self.sample$\_$set$2$

return self.sample$\_$set$1-$ self.sample$\_$set$2$

return self.sample$\_$set $1$& self.sample$\_$set $2$

return self.sample$\_$set $1^{{?}^{?}}$ self.sample$\_$set $2$