#include <iostream>
#include <ginac/ginac.h>
using namespace std;
using namespace GiNaC;

int main()
{
    parser reader;
	lst expr,expr_in;
	symbol x,y;
    expr_in = ex_to<lst>(reader("{x,x}"));
    expr=y,y;
    cout << "The derivative of list1 " << expr_in.diff(x)<<endl;
	cout << "The derivative of list2 " << expr.diff(y)<<endl;
}