#include <iostream>
using namespace std;

struct MyQuestion
{
	void fun()
	{ cout<<"a"; }
	
	void fun()const
	{ cout<<"b"; }

	void call()
	{
		const auto *c = this;
		c->fun(); 	// calls fun() const
		
		fun(); 		// calls fun()
	}
};

int main() {
	MyQuestion q;
	q.call();
}