#include <iostream>

class Animal
{
    public:
        int x;
        int y;
        int z;
        Animal & setx(int v) { x = v; return *this;}
        Animal & sety(int v) { y = v; return *this;}
        Animal & setz(int v) { z = v; return *this;}
};

int main() {
	// your code goes here
	
	Animal anml;
	anml.setx(5).sety(6).setz(7);
	std::cout << anml.x << ", " << anml.y << ", " << anml.z << std::endl;
	return 0;
}