#include <iostream>
using namespace std;

class seed {
    int _grow;
public:
    seed() {
        _grow = 0;
    }

    ~seed() {
        _grow = 0;
    }

    void grow() {
        cout << "seed" << endl;
        _grow++;
    }

    bool fresh() {
        if (_grow < 5) {
            return true;
        }
        else return false;
    }

    void seed_print() {
        cout << "seed" << endl;
        cout << _grow << endl;
        cout << fresh() << endl;
    }
};

class plant :public seed {
    int grow_plant, oxygen;
public:
    plant() {
        grow_plant = 0;
        oxygen = 0;
    }

    ~plant() {
        grow_plant = 0;
        oxygen = 0;
    }

    void grow() {
        cout << "plant" << endl;
        grow_plant++;
    }

    void print() {
        cout << "plant" << endl;
        cout << grow_plant << "  " << oxygen << endl;
    }

    void plant_oxygen() {
        oxygen = grow_plant * 2;
    }
};





int main() {
    plant P;
    P.print();

    P.grow();
    P.grow();
    P.grow();
    P.grow();
    P.grow();
    P.plant_oxygen();

    P.print();
    P.seed_print();


    return 0;
}