#include <iostream>

using namespace std;

class Chain

{

public:

    bool Handle() { return false; }

};

class Level1 : public Chain

{

public:

    bool Handle()

    {

        cout<<"Level1::true"<<endl;

        return true;

    }

};

class Level2 : public Level1

{

public:

    bool Handle()

    {

        cout<<"Level2::Handle"<<endl;

        return Level1::Handle();

    }

};

class Level3 : public Level2

{

public:

    bool Handle()

    {

        cout<<"Level3::Handle"<<endl;

        return Level2::Handle();

    }

};

int main(int argc, char *argv[])

{

    Level3 level3;

    level3.Handle();

    return ;

}