import java.awt.geom.AffineTransform;
import java.lang.invoke.SwitchPoint;
import java.util.concurrent.Semaphore;
import java.util.*;
public class Main {
    public static void main(String args[]) {
        init();
        List c_atoms = new ArrayList<>();
        List h_atoms = new ArrayList<>();
        List o_atoms = new ArrayList<>();
        for(int i = 0; i < 20; i++) {
            c_atoms.add(new C());
        }
        for(int i = 0; i < 40; i++) {
            h_atoms.add(new H());
        }
        for(int i = 0; i < 20 ;i++) {
            o_atoms.add(new O());
        }
        for(int i = 0; i < 20 ; i++) {
            c_atoms.get(i).start();
        }
        for(int i = 0; i < 40; i++) {
            h_atoms.get(i).start();
        }
        for(int i = 0; i < 20 ;i++) {
            o_atoms.get(i).start();
        }
        try {
            for(int i = 0; i < 20 ; i++) {
                c_atoms.get(i).join();
            }
            for(int i = 0; i < 40; i++) {
                h_atoms.get(i).join();
            }
            for(int i = 0; i < 20 ;i++) {
                o_atoms.get(i).join();
            }
        }
        catch (InterruptedException e) {

        }
    }
    static Semaphore c;
    static Semaphore h;
    static Semaphore o;
    static Semaphore c_created;
    static Semaphore h_created;
    static Semaphore o_created;
    static Semaphore boss;

    private static void init() {
        c = new Semaphore(2);
        h = new Semaphore(4);
        o = new Semaphore(2);
        c_created = new Semaphore(0);
        h_created = new Semaphore(0);
        o_created = new Semaphore(0);
        boss = new Semaphore(0);
    }
    static class C extends Thread {

        private void excecute() throws InterruptedException {
            c.acquire(1);
            c_created.release(6);
            h_created.acquire(1);
            o_created.acquire(1);
            boss.release(6);
            System.out.println("C bonding");
            c.release(1);
        }

        @Override
        public void run() {
            try {
                excecute();
            } catch (InterruptedException e) {

            }
        }
    }
    static class H extends Thread {
        private void excecute() throws InterruptedException{
            h.acquire(1);
            c_created.acquire(1);
            h_created.release(4);
            o_created.acquire(1);
            boss.acquire(1);
            System.out.println("H bonding");
            h.release();
        }
        @Override
        public void run() {
            try {
                excecute();

            }
            catch (InterruptedException e) {

            }
        }
    }
    static class O extends Thread {
        private void excecute() throws InterruptedException{
            o.acquire(1);
            c_created.acquire(1);
            h_created.acquire(1);
            o_created.release(6);
            boss.acquire(1);
            System.out.println("O bonding");
            o.release(1);
        }
        @Override
        public void run() {
            try {
                excecute();
            }
            catch (InterruptedException e) {

            }
        }
    }

}