#include <iostream>
#include <string>

using namespace std;


void fun1()
{
   cout << "fun1 called\n";

   cout << "fun1 returns\n";
}

void fun2()
{
   fun1();
   fun1();
}

void fun3()
{
   fun2();
   fun2();
   fun2();
}
int main()
{
   fun3();
   fun3();
}