#include <iostream>
using namespace std;
class Step3
{
public:
~Step3() { cout << "world!"; };
};
class Step2_3: private Step3
{
public:
~Step2_3() { cout << ", "; };
};
class Step1
{
public:
~Step1() { cout << "Hello"; };
};
int main() {
Step2_3 ignition;
Step1 force;
return 0;
}
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