What will be the output of the following C++ code?

#include <iostream>
#include <list>
using namespace std;
int main ()
{
    list<int> mylist;
    list<int> :: iterator it1, it2;
    for (int i = 1; i < 10; ++i) mylist.push_back(i * 1);
        it1 = it2 = mylist.begin();
    advance (it2, 6);
    ++it1;
    it1 = mylist.erase (it1);
    it2 = mylist.erase (it2);
    ++it1;
    --it2;
    mylist.erase (it1, it2);
    for (it1 = mylist.begin(); it1 != mylist.end(); ++it1)
        cout << ' ' << *it1;
    return 0;
}