// in the name of GOD
#include <iostream>
#include <string>

class Base
{
public :
	Base(std::string name)
	{
		std::cout<<"Hello "<<name;
	}
};

class Child: public Base
{
public :
	Child(std::string username="defaultvalue"):Base(username)
	{
	     
	}
};

int main()
{
	std::string name = "rukee";
	Child c(name);
	
}