class B {
	int x;
	int y; //new field
	bool operator==(const C& other) {
		return this->x % 3 == 0 && this->y % 4 ==0; //updated to include the new field y
	}
	bool operator!=(const C& other) {
		return this->x % 3 != 0; //Wrong: forgot to update to include new field y
	}
};
class C {
	int x;
	int y; //new field
	bool operator==(const C& other) {
		return this->x % 3 == 0 && this->y % 4 == 0; //updated to include the new field
	}
	bool operator!=(const C& other) {
		return !(*this == other); //Correct, no need to update this operator 
		                          //definition when adding the new field
	}
};
