#include <iostream>
using namespace std;
typedef void _;

_ _____(char *_) { cout << _ << endl; }
_ ____() { _____("third"); }
_ *___(_ (*______)()) {
    _____("second");
    return (_ *)______;
}
_ *__(_ *(*______)(_ (*)())) {
    _____("first");
    return (*______)(&____);
}
main () {
    _____("main");
    _ *(*_____)(_ *(*)(_ (*)())) = &__;
    (*(_ (*)())(*_____)(&___))();
}