下列程序运行结果是                                。
template
class FF {
        TT a1,a2,a3;
public :
        FF(TT b1,TT b2,TT b3) {
                a1=b1; a2=b2; a3=b3;
        }
        TT Sum() { return a1+a2+a3; }
};
void main()
{
        FF x(2,4,6),y(5,7,9);
        cout <
}