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

def set$\_$symetric$\_$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$2$