SHL

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#include <iostream>
using namespace std;
class Base {
    public:
        Base() { cout << "Base() called" << endl;
        }
};
class S1:public Base {
    public:
        S1() { cout << "S1() called" << endl;}
};
class S2:public virtual Base {
    public:
        S2() { cout << "S2() called" << endl;}
};
class M : public S1, public S2 {
    public:
         M() { cout << "M() called" << endl;}
};
int main() 
{
    M mm;
    return 0;
}

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