#include <iostream>
#include <string>

using namespace std;


void fun1(string s)
{
   cout << s<<" fun1\n";
}

void fun2(string s)
{
   cout << s << " fun2\n";
   fun1("   "+ s);
   cout << s << " fun2\n";
   fun1("   "+ s);
   cout << s << " fun2\n";
}

void fun3(string s)
{
   cout << s << " fun3\n";
   fun2("   "+s);
   cout << s << " fun3\n";
   fun2("   "+s);
   cout << s << " fun3\n";
   fun2("   "+s);
   cout << s << " fun3\n";
}
int main()
{
   fun3("call 1");
   fun3("call 2");
}